What the Heavens Declared to a Young Astronomer – ChristianityToday.com

I grew up a Jewish boy in a South African gold-mining town known as Krugersdorp. I remember sitting in shul (synagogue), enthralled as our learned rabbi expounded how God was a personal Godhe would speak to Moses, to Abraham, Isaac, and Jacob, and to many others. Growing up, I often pondered how I fit into all this.

By the time I entered the University of Witwatersrand, Johannesburg, I was deeply concerned that I had no assurance that God was indeed a personal God. I was confident that he was a historical God who had delivered our people from the hands of Pharaoh. But he seemed so far removed from the particulars of my life in Krugersdorp. Where was the personality and the vibrancy of a God who truly could speak to me?

As a student, I began working toward a degree in applied mathematics and computer science. Over the course of my studies, I became friendly with Lewis Hurst, then a professor of psychiatry and genetics. He had a great interest in astronomy, and we would discuss the complexities of the cosmos for hours at a time. Whenever we met, I would delight in explaining basic features of astronomy, such as black holes and quasars.

Intellectually, these were greatly satisfying years. Over time, I became fascinated with the elegance of the mathematical formulation of general relativity, and at age 19 I submitted my first research paper on that theme to the Royal Astronomical Society of London. When it was published one year later, I started receiving requests from observatories and universities for reprints or printed copies (on the mistaken belief that I was already a senior academic!).

But spiritually, this period was rather dry. I remember attending a meeting of the Royal Astronomical Society graced ...

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What the Heavens Declared to a Young Astronomer - ChristianityToday.com

BYU Department of Physics and Astronomy hosts Three Minute Thesis competition – The Daily Universe – Universe.byu.edu

The BYU Department of Physics and Astronomy held its Three Minute Thesis competition on Feb. 11, where students presented shortened versions of their masters theses in an effort to move on to future rounds. (Ingrid Sagers)

The BYU Department of Physics and Astronomy held its Three Minute Thesis competition where graduate students summarized their masters theses in three minutes.

Rochelle Steele and Nick Allen competed to win the department level round of the competition on Feb. 11, with Steele coming in first and Allen second.

The competition is a research presentation and skills development contest for graduate students. Participants have three minutes to present the essential aspects of their thesis.

Steeles thesis title was Searching for something in nothing: a study of voids in space. She focused on whether small galaxies can be found in voids in space.

Allen titled his thesis, Carbon Electrodes for Bioimpedance to Measure Blood Glucose with a SmartWatch. He discussed the possibility of measuring glucose levels through smartwatches for people with diabetes.

Students have to present their thesis on a single, static Powerpoint slide by spoken word and cannot use additional props or any electronic media. Those who exceed three minutes are disqualified.

The BYU Graduate Studies webpage says contestants are judged on their explanation of research, how they create interest in their topic and how they break down their message to a non-specialist audience.

The University of Queensland created the competition in 2008 and BYU has since adopted the competition, creating rounds starting within departments, then individual colleges and finally the university level.

The two winning contestants will go on to the College of Physical and Mathematical Sciences level round, competing against other departments winners on Feb. 19. The winner of that round will go on to the university-wide round on March 11.

Steele won both the departments first place slot and peoples choice award during the competition on Feb. 11.

Steeles thesis covered voids in space. She said a method called spectroscopy has been previously used to try to determine whether there are extremely small galaxies inside these voids. However, using a new method she developed, shes concluded that the energy in the voids are not galaxies.

I have learned that none of the galaxies tested are inside the void. As far as I can tell, voids are as empty as they seem. There is something else causing this energy: something that we dont yet understand about the universe, something more to discover, Steele said.

Allen presented on the long-standing finger pricking and patch use testing methods people with diabetes practice. He said the possible use of smart watches to measure glucose levels would provide real time evaluations of blood sugar.

Smartwatches effortlessly monitor other aspects of human health and would be extremely helpful for diabetes patients, he said. However, he found many challenges in measuring glucose without access to blood.

The finals round of the Three Minute Thesis university competition will be held on March 11 in the Harold B. Lee Library, with presentations streamed over Zoom.

Originally posted here:

BYU Department of Physics and Astronomy hosts Three Minute Thesis competition - The Daily Universe - Universe.byu.edu

DST astronomers trace huge optical flare from supermassive black hole discovered in the 1960s – Firstpost

Press Trust of IndiaFeb 17, 2021 10:12:47 IST

Indian astronomers have reported one of the strongest flares from a feeding supermassive black hole or blazar called BL Lacertae, analysis of which can help trace the mass of the black hole and the source of this emission, the Department of Science and Technology said on Saturday. Such analysis can provide a lead to probe mysteries and trace events at different stages of evolution of the Universe, it said. Blazars or feeding supermassive black holes in the heart of distant galaxies receive a lot of attention from the astronomical community because of their complicated emission mechanism. They emit jets of charged particles travelling nearly at the speed of light, making them one of the most luminous and energetic objects in the known universe.

"BL Lacertae blazar is 10 million light-years away and is among the 50 most prominent blazars that can be observed with the help of a relatively small telescope. It was among the 3 to 4 blazars that was predicted to be experiencing flares by the Whole Earth Blazar Telescope (WEBT), an international consortium of astronomers," the statement said.

Illustration of a shock wave (bright blob in the upper jet) after aspiral path (yellow) as it moves away from the black hole and through a section ofthe jet where the magnetic field (light blue curved lines) is wound up in a coil. Image: Cosmovision/Instituto de Astronomia

A team of astronomers led by Alok Chandra Gupta from Aryabhatta Research Institute of Observational Sciences (ARIES), an institute of the Department of Science & Technology, who has been following the blazar since October 2020 as part of an international observational campaign detected the exceptionally high flare on January 16 with the help of Sampurnanand Telescope (ST) and 1.3 m Devasthal Fast Optical Telescopes located in Nainital.

The data collected from the flare observed will help calculation of the black hole mass, size of emission region, and mechanism of the emission from one of the oldest astronomical objects known, hence opening a door to the origin and evolution of the Universe, it added.

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DST astronomers trace huge optical flare from supermassive black hole discovered in the 1960s - Firstpost

Black-sky thinking – A distinguished astronomer sees evidence of extraterrestrial life | Books & arts – The Economist

Feb 13th 2021

Extraterrestrial. By Avi Loeb. Houghton Mifflin Harcourt; 240 pages; $27. John Murray; 20

THE OBJECT came hurtling in from deep space, from the direction of Vega, a star 25 light-years away. It crossed the orbital plane of the solar system, within which the Earth and the other planets revolve around the sun, on September 6th 2017. Now under the influence of the suns gravitation, the object accelerated to around 200,000mph as it made its closest approach to the star on September 9th. Its trajectory then took it out of the solar system. A month after the object had arrived, it was well on its way back to interstellar space, moving towards the constellation of Pegasus.

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As it catapulted past the sun and began to head off, no one on Earth had any idea of the objects existence. Astronomers at the Haleakala Observatory in Maui only discovered it on October 19th; it was hidden in the data collected by their network of telescopes, as a point of light that travelled too fast to be trapped by the suns gravity. They gave it a name: Oumuamua.

In the weeks after this discovery, astronomers quickly confirmed that Oumuamua (which loosely means scout in Hawaiian) was the first interstellar object recorded as having passed through the solar system. Initially it was thought most likely to have been an asteroid or a comet; but as 2017 drew to a close, the available data continued to puzzle scientists. Their analyses indicated that Oumuamua was small (around 400 metres long) and shiny (perhaps ten times shinier than any asteroid or comet seen before). It seemed to have an elongated, cigar-like shape, at least five to ten times longer than it was wide. (Later it was generally deemed to have been flatter, like a pancake, as in the impression in the picture.) Astronomers had never seen anything like it.

In addition to these physical peculiarities, Oumuamua had travelled along a path through the solar system that could not be explained by the gravity of the sun alone. This, for me, was the most eyebrow-raising bit of data we accumulated over the roughly two weeks we were able to observe Oumuamua, writes Avi Loeb, an astronomer, in Extraterrestrial, his account of the interstellar visitation. This anomaly about Oumuamuawould soon lead me to form a hypothesis about the object that put me at odds with most of the scientific establishment.

For, after studying the available evidence, Mr Loeb concluded that the simplest explanation for the exotic strangeness of Oumuamua was that it had been created by an intelligent civilisation beyond Earth.

By definition, scientists are meant to follow wherever the evidence leads them. Personal biases and prejudices can cloud the judgments of those seeking to understand the rules of naturebut the methods of modern scientific research, developed over hundreds of years and keenly honed in the past century, seek to reduce the impact of subjective human factors that could otherwise impede progress.

Observations and data are the material on which scientists build their hypotheses. Those hypotheses are then ritually torn apart by other scientists andif they can withstand sustained critiques and are not contradicted by further evidence from the real worldthey might lay claim to being true. In science, changing your mind in the light of fresh information is seen as a good thing. If a new conjecture gathers supporting evidence and eventually supplants years of previous thinking on a topic, scientists are duty-bound to abandon the defunct ideas and embrace the new ones. The more radically an idea diverges from the mainstream, however, the greater the scrutiny it will inevitably face. Carl Sagan, an American astronomer, once summed this up: Extraordinary claims require extraordinary evidence.

That is the theory, at least. But like any profession, the path of scientific research can be influenced (both positively and negatively) by fashions and personalities, which can also determine who receives funding and which ideas get heard. Take the search for extraterrestrial intelligence, commonly known as SETI. Since the 1960s astronomers have been listening to the skies for any signs of radio signals sent out by technologically capable life beyond Earth. For most of its existence, though, SETI has been marginalised, dismissed as a lesser use of time and resources than the more prestigious study of black holes, subatomic particles, stars, galaxies and other real physics. The steadfastly radio-silent skies have not burnished SETIs image as a discipline to be taken seriously.

Mr Loeb says he has always found the hostility to SETI bizarre. Modern mainstream theoretical physicists, he points out, accept the study of spatial dimensions beyond the three (length, breadth and depth) with which people are familiar. Experimental evidence for these dimensions, however, does not exist. Similarly, many leading cosmologists think that this universe is one among an infinite number of others that exist together in a multiverse. But, again, experimental evidence for that proposition does not exist. String theory, the putative theory of everything that is meant to bind together the physics of the cosmos with that of subatomic particles, is considered scientific even though there is no direct evidence to prove it is real.

Compared with these abstract theories, the notion that there could be life elsewhere in the universe, when it is known to exist on Earth, should not seem so radical a subject of study. Mr Loeb thinks resistance to it comes from two sources. First, the laughable popular narratives in which aliens lay waste to Earths cities and possess superhuman wisdom. He is no fan of science fiction that ignores the laws of physics.

But the more important reason, he says, is a conservatism within science, which is sustained by the desire of individual scientists to keep risk low and funding high:

By limiting interpretations or placing blinders on our telescopes, we risk missing discoveriesThe scientific communitys pre judice or closed-mindednesshowever you want to describe itis particularly pervasive and powerful when it comes to the search for alien life, especially intelligent life. Many researchers refuse to even consider the possibility that a bizarre object or phenomenon might be evidence of an advanced civilisation.

The fact that accusations of conservatism in mainstream science are being levelled by an astronomer situated at the very heart of the scientific establishment may seem ironic. Mr Loeb has, after all, spent most of his career at prestigious American institutions, including a recent spell as the head of the astronomy department at Harvard University. He is also chairman of the board on physics and astronomy of the US National Academies.

His prominent status in astronomy circles has ensured that Mr Loebs radical hypothesis has attracted widespread attention. All the same, and as he reports in his book, it would be putting the matter mildly to say that his idea has been met with disapproval by his scientific colleagues. Writing in Nature Astronomy in July 2019, a research team assembled by the International Space Science Institute concluded that it had found no compelling evidence to favour an alien explanation for Oumuamua. It dismissed Mr Loebs theory as one not based on fact.

This is not his first brush with scientific celebrity. In 2016 he was the astrophysical brain behind Breakthrough Starshot, a $100m project funded by Yuri Milner, an Israeli-Russian tech billionaire, the goal of which is to dispatch a fleet of tiny probes called Starchips to Alpha Centauri, the nearest star to the sun. They are to be equipped with cameras able to relay any signs of life they might find back to Earth.Mr Loeb worked out that it might be possible to accelerate a Starchip to around 20% of the speed of light if it were fitted with an ultra-thin sail and a 100-gigawatt laser were directed towards it for a few minutes. So launched, the Starchips would in theory make the 4.4-light-year journey to Alpha Centauri in between 20 and 30 years.

The Breakthrough Starshot project was announced a year before the discovery of Oumuamua. The hunt for life elsewhere may well have been on Mr Loebs mind when he was contemplating the objects most intriguing anomaly: the weird way it had moved past the sun.

In June 2018 scientists reported that Oumuamuas trajectory had deviated slightly from the one it might have been expected to follow if it had been determined purely by the suns gravitational attraction. As it passed the sun the object was pushed away by an unexplained force. Comets sometimes behave like this when they get close to the sun, but in their case the force is easy to explain: a tail of dust and gas is ejected from the ball of ice as it is heated by the sun, which gives the object a rocket-like push. Yet no such tail was detected near Oumuamua.

Mr Loeb had another hypothesis: perhaps sunlight was bouncing off the objects surface like the wind off a thin sail. A thin, sturdy, light sail, of the sort that he had himself proposed for the Breakthrough Starshot project, would be technically feasible for a more advanced civilisation. In any case, such a sail could not occur naturally; it would have to be engineered by intelligent beings.

He may or may not be right about Oumuamua. But that hardly seems to make much difference to what is ultimately the mainthesis of his book. Conservatism may not be unique to astrophysics, he argues, but it is depressing and concerning given the huge number of anomalies still perceived in the universe. Mr Loeb is surely correct that scientists studying the vastness of the cosmos should entertain risky ideas more often, for the universe is undoubtedly more wild and unexpected than any extremes conjured by the human imagination. Extraterrestrial considers the possibility of intelligent life elsewhere, but its core message, an update to Sagans maxim, is aimed squarely at life on Earth: Extraordinary conservatism keeps us extraordinarily ignorant.

Dig Deeper

The search for life elsewhere in the universe is heating up and may even yield an answer soon. In addition to our coverage, learn about Avi Loeb, the alien hunter of Harvard, in our sister publication, 1843, and read our review of his book, Extraterrestrial.

This article appeared in the Books & arts section of the print edition under the headline "Black-sky thinking"

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Black-sky thinking - A distinguished astronomer sees evidence of extraterrestrial life | Books & arts - The Economist

Farthest known object in the solar system identified – EarthSky

This illustration imagines what the distant object nicknamed Farfarout might look like in the outer reaches of our solar system. The most distant object yet discovered in our solar system, Farfarout is 132 astronomical units from the sun, which is 132 times farther from the sun than Earth is. Estimated to be about 250 miles (400 km) across, Farfarout is shown in the lower right, while the sun appears in the upper left. The Milky Way stretches diagonally across the background. Image via NOIRLab/ NSF/ AURA/ J. da Silva.

Back in January 2018, astronomers detected a faint object in our solar system so far away from the sun that they nicknamed it Farfarout. After a couple of years of additional observations, the astronomers are now, as of February 10, 2021, ready to declare that this object, with the formal designation 2018 AG37, is indeed the farthest object in the solar system yet discovered.

Because Farfarout is so, well, far out, it has a huge orbit around the sun that takes it a long time more than a millennium to complete. Because of this slow movement along its orbit, astronomers must take many observations over a long period of time to truly determine how far away it is.

The Subaru Telescope in Hawaii made the initial observation, and followup observations with the Gemini North telescope in Hawaii and the Magellan Telescopes in Chile have allowed astronomers to calculate Farfarouts current distance of 132 astronomical units from the sun. An astronomical unit (AU) is defined as the distance of Earth from the sun, with 1 AU equaling 93 million miles (150 million km). Therefore, Farfarout is 132 times farther away from the sun than Earth is from the sun.

As delightful as the name Farfarout is, the object will get an official name in coming years after more observations provide more information. Astronomers estimate the dim solar system body to be about 250 miles across, which puts it at the small end to be labeled a dwarf planet.

View larger. | This artists concept depicts the most distant object yet found in our solar system, nicknamed Farfarout, in the lower right. In the lower left, a graph shows the distances of the planets, dwarf planets, candidate dwarf planets, and Farfarout from the sun in astronomical units (AU). One AU is equal to Earths average distance from the sun. Farfarout is 132 AU from the sun. Image via NOIRLab/ NSF/ AURA/ J. da Silva.

A quirky fact about Farfarout is that it isnt always that far away. The objects orbit is so stretched out that at its farthest point, it reaches 175 AU from the sun, while at its closest point its 27 AU. This would occasionally put it inside Neptunes orbit. In fact, a close encounter with Neptune is probably what flung the object out into the far reaches of the solar system in the first place.

How far out is Farfarout compared to distant solar system objects? Neptune is 30 AU from the sun, and Pluto is, on average, 39 AU from the sun. Voyager 1 and Voyager 2, spacecraft launched in the 1970s, are the furthest manmade objects in space and lie at 152 and 126 AU, respectively.

The previous record holder for farthest object in the solar system was nicknamed Farout (no surprise) and was estimated to be 124 AU from the sun. But these far out objects cant compete with the hypothesized Oort Cloud of comets, which is believed to lie between 2,000 and possibly as far as 50,000 AU from the sun, or 4/5 of a light-year away. So while Farfarout is indeed a very long way away, there are still things farther out to be discovered. Maybe a future Farfarfarout is in the offing.

This is a side-by-side comparison of the discovery images of Farfarout (2018 AG37) taken on January 15, 2018, and January 16, 2018. Note how the object moves in reference to background stars and galaxies. Image via Scott Sheppard/ NOIRLab.

Scott Sheppard, an astronomer from the Carnegie Institution for Science, co-discovered both Farout and Farfarout. He sees the newest record holder as a starting point, not an end:

The discovery of Farfarout shows our increasing ability to map the outer solar system and observe farther and farther towards the fringes of our solar system. Only with the advancements in the last few years of large digital cameras on very large telescopes has it been possible to efficiently discover very distant objects like Farfarout. Even though some of these distant objects are quite large the size of dwarf planets they are very faint because of their extreme distances from the sun. Farfarout is just the tip of the iceberg of objects in the very distant solar system.

Bottom line: Farfarout is the nickname given to the farthest known object in the solar system, which is currently at 132 AU, or more than 12 billion miles from the sun.

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Farthest known object in the solar system identified - EarthSky

Homan: Surge at border will be ‘astronomical’ without Title 42 in Mexico – Yahoo News

The Telegraph

New Zealand Prime Minister Jacinda Ardern has accused Australia of "exporting its problems" for cancelling the citizenship of a dual national Australian-New Zealander who reportedly joined the Islamic State in Syria On Monday Turkeys Defence ministry said a 26-year-old New Zealand Daesh terrorist was being deported with her two children after Turkish border staff caught them crossing illegally from the northwest Syrian province of Idlib. Media reports identified the woman as Suhayra Aden, who moved to Australia from New Zealand when she was six years old and lived in Melbourne before travelling to Syria on her Australian passport in 2014 to live under the so-called Islamic State. On Tuesday an irate Ms Ardern said she had spoken with Australian Prime Minister Scott Morrison about the dual national in 2019 after she was detained with her two children after Western-backed Syrian Kurdish forces retook the final sliver of IS territory in Syria. Mr Morrison then revoked Ms Adens citizenship without telling Ms Ardern, leaving New Zealand to deal with the dilemma alone. You can imagine my response, she said, after learning the next year that Australia had acted unilaterally. Our very strong view on behalf of New Zealanders was that this individual was clearly most appropriately dealt with in Australia That is where their family reside, that is where their links reside, and that is the place they departed for Syria, she said. Ms Ardern said the welfare of Ms Adens surviving children, aged five and two, was paramount. These children were born in a conflict zone through no fault of their own, Ms Ardern. Ms Aden reportedly had a third child who died of pneumonia, after marrying twice in Syria to Swedish nationals who also both died. Ms Ardern said Australia had abdicated responsibility for Ms Aden, who spent most of her life in Australia. New Zealand, frankly, is tired of having Australia exporting its problems, Ms Ardern said. If the shoe were on the other foot we would take responsibility, that would be the right thing to do and I ask Australia to do the same. But an uncontrite Mr Morrison said his only concern was the safety of Australians. Its my job as Australias prime minister to put Australias national security interests first, he told a press conference. Australian legislation to automatically cancel citizenship for dual nationals determined to have engaged in terrorism has been used against at least 17 people who reportedly joined IS. The case highlights the unresolved issue of tens of thousands of prisoners left in limbo following the territorial defeat of IS. Most are held in squalid conditions in the Al-Hol near the Iraqi border, though following hundreds of escapes from the sprawling camp authorities last year moved dozens of Western prisoners to the smaller and more secure Roj camp. At one time up to 66 Australians, including 44 children, were believed to be in the camps, though the Australian government repatriated eight children in June 2019, and others may have escaped. One New Zealand man is known to be detained in northeast Syria. Mark Taylor, who became known as the Bumbling Jihadi for revealing his location in posts calling for attacks on New Zealanders, has been held in a Kurdish jail since surrendering in late 2018. Earlier this month a group of United Nations experts called on the 57 governments who are believed to have nationals in the camps to repatriate their citizens, following reports that 20 people were murdered in Al-Hol in January.

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Homan: Surge at border will be 'astronomical' without Title 42 in Mexico - Yahoo News

Radio Astronomer F. Peter Schloerb Named to ARCS Foundation Alumni Hall of Fame – UMass News and Media Relations

At the January National Board Meeting. ARCS Foundation Inc. announced radio astronomer and planetary Scientist F. Peter Schloerb, has been selected as the 2021 inductee into theARCS Alumni Hall of Fame.

Hall of Fame inductees are ARCS Scholar Alumni who have made outstanding contributions to the advancement of science and increased our nations scientific competitiveness. Selection is by a panel comprised of ARCS Foundation national board members and advisors and is based on alumni contributions in the areas of scientific innovation, discovery, economic impact, development of future scientists, and enhancement of US scientific superiority.

Schloerb is theUMassdirector of theLarge Millimeter Telescope (LMT) Alfonso Serrano,a joint project between UMass andInstituto Nacional de Astrofsica, ptica y Electrnicain Mexico. He is also a professor and director of theFive College Radio Astronomy Observatoryat UMass.

ARCS Foundation has recognized Schloerb for his leadership and vision for the concept, design and construction of the LMT, which is a crucial component in a network of eight strategically placed telescopes around the globe known as the Event Horizon Telescope (EHT).The international collaboration, which includes hundreds of scientists in twenty countries, forms an Earth-sized virtual telescope with unprecedented sensitivity and resolution.

In April 2019, the EHT partnership, including Schloerb and the LMT, publicly revealed the first ever image of a supermassive black hole at the center of a galaxy 55 million light-years awayalso marking a powerful confirmation ofAlbert Einsteins theory of general relativity.

The image produced prolific honors for Dr. Schloerb and members of the EHT, including the2020 Breakthrough Prize in Fundamental Physics.

Schloerb was an ARCS Scholar in 1977 while attending theCalifornia Institute of Technologywhere he received his Ph.D. in planetary science. Upon accepting his induction into the ARCS Alumni Hall of Fame, he thanked ARCS for their encouragement in his scientific studies that culminated into the historic observations he shares with the world today.

ARCS Foundation means a great deal to me because they supported me during my graduate education. The support of young scientists is very important to the advancement of science in the US, and more generally, around the world.

It is truly our pleasure to welcome Dr. F. Peter Schloerb into the distinguished ARCS Alumni Hall of Fame, said Sherry Lundeen, national president of ARCS Foundation. His prolific impact in US planetary space studies embodies ARCS Foundations historic beginnings and our mission to award outstanding scholars who will promote US competitiveness in STEM fields. We are extremely proud of Dr. Schloerbs work, as it continues to provide significant images that will be studied for years to come.

As a member ofARCS Alumni Hall of Fame, Schloerb joins the company of eleven other outstanding alumni who also received ARCS Foundation funding to support their education in past years.

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Radio Astronomer F. Peter Schloerb Named to ARCS Foundation Alumni Hall of Fame - UMass News and Media Relations

View On Astronomy: Observing the Winter Circle is quite the seasonal sight – The Independent

I never tire of observing shooting stars, as long as the activity keeps up so I dont fall asleep. So with exceptionally clear skies and a relatively warm temperature of 42 degrees (not bad for the Geminids), last December I settled down in a lounge chair on my back porch to scan the heavens for meteors blazing across the sky.

I started my observing session on Dec. 13 at 10 p.m. and ended it at 11:30 p.m. During that 90-minute span I counted 20 Geminids. Nothing spectacular. No brilliant fireballs. A few shooting stars rivaled the brightness of Orions Rigel. Many were much dimmer. Regardless, the frequency of these meteors streaking through the Earths atmosphere was sufficient enough to maintain my interest.

As the night progressed, a slight breeze came up. Considering it was December, it was still fairly mild. Ive observed Geminids in the past when temperatures were in the lower 20s, with me snuggled up in a sleeping bag. Some high thin cloudsbegan to encroach the sky just before 11:30 p.m., so I called itquits.

As I sat facing east around 10 p.m., the constellation Gemini was already above my tree line. Orion the mighty hunter was high in the southeast. Soon, seven of the brightest stars we can see from the Earth would be in full view as the star patterns continued to rise higher into the sky.

I looked out at 4:30 a.m. to see if it was clear and if the activity had increased. It was totally overcast.

I hope you took advantage of the optimum observing conditions to observe a few meteors yourself.

Im sure youve heard of the Summer Triangle. This shape is formed by connecting three bright stars Deneb (in Cygnus), Vega (in Lyra), and Altair (in Aquila). This triangle of stars is high overhead during mid-summer.

Well the winter sky has its own special asterism, and this one is huge. Its called the Winter Circle or Winter Hexagon. Ill explain why you can get both shapes from the stars.

Please examine the basic star map accompanying this article. This chart represents the sky for Feb. 1 at 9 p.m., looking from a point directly overhead (zenith) toward the southern horizon. A circle or, actually, an ellipse can be drawn through each of the labeled stars. However, you can also draw a straight line from one star to the next and create a hexagon. Betelgeuse, though inside either pattern, is still considered part of the asterism.

Before we examine each of the stars in the Winter Circle, lets review three important terms. First, the brightness of any celestial object is called its magnitude. The basic idea is that the more negative the magnitude, the brighter the object. The more positive the magnitude, the dimmer the object is. So, the Sun is -26.74, the Full Moon -12.92, Venus -4.89, Saturn approximately 0, well-known Polaris (the North Star) is magnitude +2, and the naked-eye limit with no light pollution is magnitude +6. Pluto is about +13.65. (Usually the plus sign (+) is assumed and not used, but I do so in this column for clarity.)

Second, a stars distance is measured in light years. One light year is equal to just under six trillion miles. Third, the spectral classification of a star is categorized using the following letters: O, B, A, F, G, K, M, and often followed by additional numbers and letters to further refine the classification. O stars are the hottest, while M stars are the coolest.

Lets start our tour of the Winter Circle with the brightest star we can see in the sky (besides the Sun of course) Sirius. Sirius is in Canis Major, the Big Dog. Sirius shines at magnitude -1.44 and it is 8.7 light years away. Do the math and this fairly close neighbor to our Sun is 52.2 trillion miles from us. For you Rhode Islanders, thats much farther than Newport or Westerly! Sirius is a hot, blue-white star (spectral class A0) about 1.7 times the diameter of our Sun.

Next, we move northward and clockwise in the sky to locate Procyon in Canis Minor, the Little Dog. Procyon is a white star (F5) shining at magnitude +0.40 and is 11 light years distant. Its about twice the diameter of our Sun. Moving farther northward we encounter the Gemini twins, Pollux and Castor. Pollux is 34 light years distant, while Castor is 18 light years farther away at 52. Pollux is a cool, orange giant (K0) ten times the Suns diameter, while Castor is a hot, blue-white star (A1) only twice the diameter of the Sun. Pollux and Castor shine at +1.16 and +1.93 magnitude, respectively.

Now we swing up and over to a constellation almost directly overhead Auriga, where we find +1.93 magnitude Capella. While Capella (G6) is a class G-type yellow star like the Sun (G2), it has three times more mass and is just over seven times the Suns diameter. Next, we proceed south to encounter the orange giant (K5) Aldebaran in Taurus. Aldebaran represents the bulls eye in the star pattern known as the Hyades star cluster (shaped like a V). Aldebaran, 65 light years away, is a cool star which has expanded to be just over 44 times the diameter of the Sun with only 2.5 times our Suns mass.

Continue to swing southward in the sky until we arrive at the bottom right star representing Orions left foot. (Please note: Orion is facing us.) This star is +0.18 magnitude Rigel, a blue supergiant (B8) 800 light years away the most distant of the Winter Circle stars. Rigel is 62 times the diameter of our Sun and contains 17 times more mass. We now complete the tour of the Winter Circle by swinging back to Sirius.

But wait. No, I didnt forget about Betelgeuse. Betelgeuse is the red supergiant (M2) star that marks the top right shoulder of Orion. It shines at magnitude +0.45 and resides at a distance of 520 light years. Betelgeuse is also a very large star, measuring in at a conservative 950 solar diameters. If you replaced our Sun with Betelgeuse it would extend out to the asteroid belt between Mars and Jupiter.

As you can see by this small sampling of stars that comprise the Winter Circle, stars are a lot like people: They are all different, but their differences make them unique and important.

The next time you have an opportunity to observe the Winter Circle, you will have a better understanding and appreciation of the scale and diversity of our stellar neighbors in this region of the Milky Way Galaxy.

Keep your eyes to the skies.

The author has been involved in the field of observational astronomy in Rhode Island for more than 35 years. He serves as historian of Skyscrapers Inc., the second oldest continuously operating amateur astronomical society in the United States.

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View On Astronomy: Observing the Winter Circle is quite the seasonal sight - The Independent

Harvard astronomer argues that alien vessel paid us a visit – The Hindu

We're nothing special, there are lots of other cultures out there, and we just need to find them, says Avi Loeb

Discovering there's intelligent life beyond our planet could be the most transformative event in human history but what if scientists decided to collectively ignore evidence suggesting it already happened?

That's the premise of a new book by a top astronomer, who argues that the simplest and best explanation for the highly unusual characteristics of an interstellar object that sped through our solar system in 2017 is that it was alien technology.

Sound kooky? Avi Loeb says the evidence holds otherwise, and is convinced his peers in the scientific community are so consumed by groupthink they're unwilling to wield Occam's razor.

Loeb's stellar credentials he was the longest-serving chair of astronomy at Harvard, has published hundreds of pioneering papers, and has collaborated with greats like the late Stephen Hawking make him difficult to dismiss outright.

"Thinking that we are unique and special and privileged is arrogant," he told AFP in a video call. "The correct approach is to be modest and say: 'We're nothing special, there are lots of other cultures out there, and we just need to find them.'"

Loeb, 58, lays out the argument for the alien origins of the object named 'Oumuamua "scout" in Hawaiian in "Extraterrestrial: The First Sign of Intelligent Life Beyond Earth."

The facts are as follows.

In order to explain what happened, astronomers had to come up with novel theories, such as that it was made of hydrogen ice and would therefore not have visible trails, or that it disintegrated into a dust cloud.

"These ideas that came to explain specific properties of 'Oumuamua always involve something that we have never seen before," said Loeb. "If that's the direction we are taking, then why not contemplate an artificial origin?"

'Oumuamua was never photographed close-up during its brief sojourn we only learned of its existence once it was already on its way out of our solar system.

There are two shapes that fit the peculiarities observed long and thin like a cigar, or flat and round like a pancake, almost razor thin.

Abraham (Avi) Loeb is the Frank B. Baird, Jr., Professor of Science at Harvard University. Credit: https://www.cfa.harvard.edu/~loeb/

Loeb says simulations favour the latter, and believes the object was deliberately crafted as a light sail propelled by stellar radiation.

Another oddity was the way the object moved compounding the strangeness of its passage.

Before encountering our Sun, 'Oumuamua was "at rest" relative to nearby stars statistically very rare. Rather than think of it as a vessel hurtling through space, from the object's perspective, our solar system slammed into it.

"Perhaps 'Oumuamua was like a buoy resting in the expanse of the universe," writes Loeb. Like a trip wire left by an intelligent lifeform, waiting to be triggered by a star system.

Loeb's ideas have placed him at odds with fellow astronomers.

Writing in Forbes, astrophysicist Ethan Siegel called Loeb a "once-respected scientist" who, having failed to convince his peers of his arguments, had taken to pandering to the public.

Loeb, for his part, protests a "culture of bullying" in the academy that punishes those who question orthodoxy just as Galileo was punished when he proposed the Earth was not the center of the universe.

Compared to speculative yet respected branches of theoretical physics such as looking for dark matter or multiverses the search for alien life is a far more commonsense avenue to pursue, he said.

That's why Loeb's pushing for a new branch of astronomy, "space archaeology," to hunt for the biological and technological signatures of extraterrestrials.

"If we find evidence for technologies that took a million years to develop, then we can get a shortcut into these technologies, we can employ them on Earth," said Loeb, who spent his childhood on an Israeli farm reading philosophy and pondering life's big questions.

Such a discovery could also "give us a sense that we are part of the same team" as humanity confronts threats ranging from climate change to nuclear conflict. "Rather than fight each other like nations do very often, we would perhaps collaborate."

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Harvard astronomer argues that alien vessel paid us a visit - The Hindu

How Astronomer Anton Pannekoek Planned To Storm the Heavens – The Wire Science

Dutch astronomer Anton Pannekoek combined the roles of an important socialist thinker and a prominent scientist. Photo: Wikimedia Commons.

There has always been a healthy crossover between Marxism and the natural sciences. Frederick Engels kept abreast of the latest scientific knowledge in his own time. In his work Dialectics of Nature, Engels warned that no matter how far humans were able to perfect their forms of social organisation, a time would inevitably come when the Earth could no longer sustain organic life:

And what will happen to our solar system will happen sooner or later to all the other systems of our island universe; it will happen to all the other innumerable island universes, even to those the light of which will never reach the Earth while there is a living human eye to receive it.

From the other side of the intellectual fence, leading twentieth-century scientists like John Desmond Bernal and J.B.S. Haldane had strong Marxist sympathies. In recent decades, figures like Stephen Jay Gould and Mike Davis have continued this dialogue, crossing the bridge between human and natural history in search of insights for both fields of study.

However, there is one figure who stands out for combining the roles of an important socialist thinker and a prominent scientist: Antonie Anton Pannekoek. The Dutch Marxist had two great passions in his life, the emancipation of the working class and the study of the universe. We can find traces of Pannekoeks influence everywhere from the writings of Lenin to the surface of the Moon.

Red Moon

Born in the Netherlands in 1873, soon after Charles Darwin published The Origin of Species and Karl Marx published Capital, Pannekoek died in 1960, just as humanity entered the space age. The final sentence of his popular work, A History of Astronomy (1951), captured the two sides of his work:

It is time for mankind to ensure itself of material abundance by establishing a free, self-managed world-society of productive labor, thereby freeing its mental powers for perfecting its knowledge of nature and the universe.

This was an unusual conclusion for a book that became a standard introduction to the field. The 1961 English-language edition omitted it from the text.

When he passed away at the age of eighty-seven, Pannekoek could boast two illustrious careers. As an astronomer, he had received an honorary degree from Harvard and the Gold Medal of the British Royal Astronomical Society. A moon crater and an asteroid bear his name, along with the Anton Pannekoek Astronomical Institute at the University of Amsterdam.

We can find traces of Pannekoeks influence everywhere from the writings of Lenin to the surface of the Moon.

As a Marxist, Pannekoek had been a prominent theoretician in the European socialist movement. In the years before the First World War, he defended Marxist radicalism against the reformist ideas of Eduard Bernstein, and later, along with Rosa Luxemburg, criticised the so-called pope of Marxism, Karl Kautsky.

These arguments earned him the admiration of Lenin, but the Russian revolutionary leader subsequently took issue with Pannekoeks ideas in his famous pamphlet, Left-Wing Communism: An Infantile Disorder. Pannekoek became one of the leading thinkers for a dissident current known as council communism that rejected all political parties and states. By the end of his life, he was a marginal figure in the world of politics, even as his scientific reputation grew.

Also read: People Confuse Scientific Objectivity With Ideological Neutrality

Spirit and matter

Pannekoek grew up in a liberal, bourgeois family in the Netherlands. In 1898, after he had completed his studies, the observatory in the Dutch university city of Leiden took him on. Pannekoek felt that his social standing required him to join the bourgeois liberal party: this was his first step into politics.

The turning point in his political development came when he read, more or less by accident, the 1897 novel Equality by US utopian Edward Bellamy. Pannekoek described the experience as if a blindfold had been lifted from his eyes, revealing to me that theories have a social foundation and meaning, from the abstract they became embedded in material, real interests.

Pannekoeks search for the social foundation of ideas led him toward Marxism. The following year, he joined the Sociaal-Democratische Arbeiderspartij (Social-Democratic Workers Party, SDAP) the main Dutch Marxist party, which had just won two parliamentary seats.

In 1919, Pannekoek wrote down his thinking on the development of ideas in the brochure Historical Materialism. Pannekoek started from the basic Marxist insight that history was made by human beings but what drove people in making history? According to Pannekoek, in each society there existed deeper thoughts and emotions, general conceptions of what is good and necessary for the world.

As far as a persons individual consciousness is concerned, such ideas determine their acts, and Marxist materialism

does not deny the importance of spiritual motives, but returns them to their material origin, to the real relations of human society. We call these real relations material in the sense that they can be objectively observed not in the sense of opposing matter to spirit.

People did not freely choose to enter into such relations, as they had been formed by the societies around them. Each society had to constantly reproduce not only its economic organisation but also the relations that fill peoples lives, and hence determine their thoughts, desires and feelings.

Pannekoek differed from many self-described orthodox Marxists of his era in his refusal to counterpose spirit to matter. He saw spirit, the ensemble of a persons knowledge and convictions, as the link between the conditions in which people found themselves and their various attempts to influence those conditions.

Like several of his Dutch comrades, such as the poets Herman Gorter and Henriette Roland Holst, Pannekoek had been deeply influenced by the ideas of Josef Dietzgen (1828-1888), a German socialist thinker who developed a theory similar to that of Marx and Engels in parallel to the founders of Marxism. According to Dietzgen, a tanner and self-taught philosopher, everything that existed in the universe, including thought objects, formed part of material reality.

Pannekoek felt that this insight of Dietzgens offered a necessary corrective to the approach of many socialists who thought that they could reduce material reality to an economic foundation. He insisted that thought objects such as spirit, political convictions and class consciousness had their own role to play in the struggle for socialism.

Science and knowledge are important sources of power, Pannekoek wrote in 1909. To liberate itself, the working class needed to master science and knowledge while developing its class consciousness and a disciplined commitment to the goal of socialism what Pannekoek called socialist spirit.

Pannekoek, Lenin and Kautsky

For Pannekoek, spreading this socialist spirit was a full-time job. In 1906, Karl Kautsky, the leading theoretician of the German Social Democrats (SPD), invited him to become a lecturer at his partys school. Pannekoek also wrote extensively for journals and newspapers published by the SPD, which at the time was considered the flagship of international socialism.

The most radical SPD branches in particular printed his articles and invited Pannekoek to give lectures. He became known as a critic of revisionist socialists such as Eduard Bernstein, who believed in a gradual socialist transformation of society. Increasingly, he also started to criticise the ideas of Karl Kautsky himself.

In a 1912 article, Marxist Theory and Revolutionary Tactics, Pannekoek spelled out the differences between his thinking and that of figures like Bernstein:

Whereas Revisionism seeks to limit our activity to parliamentary and trade-union campaigns, to the achievement of reforms and improvements which will evolve naturally into socialism a perspective which serves as the basis for reformist tactics aimed solely at short-term gains radicalism stresses the inevitability of the revolutionary struggle for the conquest of power that lies before us, and therefore directs its tactics towards raising class consciousness and increasing the power of the proletariat.

Pannekoek explained that he did not consider Kautsky himself to be a revisionist but disagreed with what he called his passive radicalism. He accused Kautsky of seeing revolution as an event in the future, a political apocalypse, with nothing to do in the meantime but prepare for the final showdown and wait on events:

In our view, revolution is a process, the first stages of which we are now experiencing, for it is only by the struggle for power itself that the masses can be assembled, drilled and formed into an organization capable of taking power.

Also read: J. Posadas, the Trotskyist Who Believed in Intergalactic Communism

Lenin later quoted favourably from Pannekoeks polemics against Kautsky in his 1917 work The State and Revolution.

Pannekoek did not reject the struggle for reforms but insisted that they had to form part of the wider struggle for the socialist goal. So long as the bourgeoisie remained in power, reforms would also be under threat of rollback. Hard-won social reforms, Pannekoek wrote in 1909, are steps on the way to the goal in as far as they strengthen our power.

He called on workers to take matters into their own hands and force their leaders to adopt a more radical course:

Everything depends on the masses so long as the masses look up towards their leaders while waiting for them to formulate the watchwords, the movement cannot take the right course. Only when the masses themselves take the initiative is a powerful upsurge of our movement possible.

This was a productive period for Pannekoek, during which he allied with Gorter, Roland Holst and Luxemburg in support of the revolutionary wing in European socialism.

In 1909, he published The Destruction of Nature, a remarkable early ecological critique of capitalism. Pannekoek argued that a rational social order will have to use the available natural resources in such a way that what is consumed is replaced at the same time, so that society does not impoverish itself and can become wealthier. Capitalism, he insisted, was incapable of doing so: it was an economy which does not think of the future but lives only in the immediate present. In todays economic order, nature does not serve humanity, but capital.

However, Pannekoeks writings from these years do betray a tension between the view that historical developments would force working people to become socialists in quasi-automatic fashion, and a conflicting emphasis on the need for socialist ideals and self-organisation. This tension would increase in the years to come.

A new era

The First World War constituted a break in Pannekoeks personal and political lives. When the war began, Pannekoek and his wife were on holiday in the Netherlands, a neutral country, and found themselves unable to return to Germany. From 1915 to 1919, Pannekoek worked as a high school teacher and private tutor.

In 1919, the prospect of an appointment at the Leiden Observatory fell through when newspapers reported that Pannekoek was an honorary member of the leadership of the new Soviet republic declared by revolutionaries in Hungary. The Hungarian revolutionaries had neglected to inform Pannekoek before granting him this honour. The Amsterdam municipality then offered Pannekoek a job with the University of Amsterdam, where he would stay for the rest of his professional life.

By now, Pannekoek had joined the newly formed Communist Party of the Netherlands. In 1919, the Communist International (Comintern) was established, and in the same year, its leaders created a secretariat with the task of organising the West European members of this new body. The base of the secretariat was to be in Berlin, with a bureau in Amsterdam. The Comintern asked Dutch communist S.J. Rutgers, who was living at the time in Moscow, to recruit Dutch radicals like Gorter, Roland Holst and Pannekoek to the Amsterdam bureau.

A highpoint of this bureaus activity was a conference held in 1920. The gathering adopted a resolution, under Pannekoeks influence, that rejected the involvement of communists in trade unions. In an earlier time, according to Pannekoek and his co-thinkers, such organisations had been tools with which the working class had won social improvements, but that era was now over.

With the outbreak of the war and the revolutions in Russia and Germany, they argued, the contradictions of capitalism had become too profound for meaningful reforms to be possible. In this new age, unions had become diversions from the revolutionary struggle.

The conference also called for a clear separation of communists from so-called centrist political parties. This term referred not to centrists in the modern sense, but to socialist forces that wavered between reform and revolution. This orientation contradicted that of many other communists, including Bolshevik leaders such as Lenin and Leon Trotsky. They believed that communists would have to take part in unions and in united fronts with other parties if they wanted to reach the mass of working people.

Barely a year after its launch, the Comintern dissolved the Amsterdam bureau. In the same year, Lenin published Left-wing Communism: An Infantile Disorder, directly attacking the ideas of Pannekoek (whom he addressed by his pseudonym, Karl Horner). In 1921, Pannekoek left the Communist Party.

Left communism

He sympathised with a breakaway group from the German communist movement, the Kommunistische Arbeiter-Partei Deutschlands (KAPD, Communist Workers Party of Germany). The KAPD was the most important organisation of the communist left. Pointing to the German experience, where the official trade unions and the SPD, a self-declared socialist party, had presided over the suppression of the revolution, this current rejected involvement in parliaments or trade unions.

The left communists argued that such organisations had become a brake on the revolutionary self-activity that was needed in an era of wars and revolutions that had begun in 1914. Pannekoek became an influential theoretician of this current, which gathered tens of thousands of supporters in its early years. Spirit was as decisive as ever for Pannekoek, but he now believed that this spirit could only develop through revolutionary struggle.

However, Pannekoek differed from many other ultra-lefts by predicting that this revolutionary struggle would be protracted. In a way that was reminiscent of Antonio Gramscis later argument in his Prison Notebooks, Pannekoek contrasted the path followed by the Russian revolution with the likely course of events in West European countries. He expected it to be much slower and more difficult because the bourgeoisie was much more powerful here than in Russia. The roots of that power ran deep, he argued:

They lie in the reign of bourgeois culture over the population as a whole, as well as over the proletariat. Over the span of one hundred years of the bourgeois era, the spiritual life of the bourgeoisie has soaked into all of society, and has created a spiritual structure and discipline which, by way of thousands of channels, penetrated and dominated the masses. This will have to be gradually purged from the proletariat through a long and tenacious struggle.

Pannekoeks ideas went on to play an important role in the development of council communism. As the name suggested, this current favoured the creation of councils (soviets) in which workers would organise themselves, overthrow capitalism, and organise the new, communist society. The council communists rejected not only electoral politics, but trade unions and political parties as well. In their eyes, such organisations stunted the necessary self-activity of the workers.

In his memoirs, written during the German occupation of the Netherlands, Pannekoek recalled that he used to be plagued by doubts about his political views and activism. But these doubts melted away when he suddenly saw the simple answer the workers themselves must decide and take full responsibility. The workers themselves would remake the world if they did not do so, it meant they were not yet ready for the task.

In the Netherlands, a country that lacked a strong revolutionary tradition, council communists were loosely organised in the small Group of International Communists. Strictly adhering to the principle that the workers themselves must be the ones who take action, the group refrained from launching political initiatives and limited itself to hosting discussions and publications.

The view from the observatory

During the earlier debates in the Communist International, the Bolshevik representative Karl Radek had sneered at Pannekoek, describing him as a figure who studied the heavens from his astronomical observatory, not the turmoil of poor, sinful people who are not pure Communists. It was an unfair remark to make about someone who only a few years earlier had been a full-time party worker. However, as time progressed and the revolutionary tide receded, Pannekoeks ideas increasingly became detached from the workers movement.

Radeks criticism of the left communists that their refusal of alliances and compromises would condemn them to empty verbal radicalism proved to be correct. As the 1930s progressed, Pannekoek did not seem to be greatly interested in what workers were actually doing, focusing instead on what he thought they would be forced to do in the future.

Instead of abandoning their supposedly outdated unions and parties, most active workers were still organised through such bodies. Pannekoek expected the working class to unite as the crisis of capitalism deepened after the Wall Street Crash of 1929, but it remained divided along political and national lines.

Pannekoek initially missed the threat of fascism as well and did not take the danger that it posed to left-wing organisations seriously. After all, he considered those parties and unions to be worse than useless brakes on the proletarian struggle.

Three years after the Nazi seizure of power, Pannekoek even claimed that the Nazis had inadvertently aided the workers movement in Germany. Fascism, he wrote had restored the natural class unity of the workers by wiping away unions and left-wing parties outdated things that hinder progress.

He quickly changed his mind and acknowledged that the banning of all workers organisations weakened the working class. However, he could not bring himself to admit what the implications of this point were for his own theories.

Also read: Science as a Cold War Propaganda Tool

Lenins philosophy

In 1938, Pannekoek published one of his best-known books: Lenin as Philosopher. Strictly speaking, it was a critique of one of Lenins own books, 1909s Materialism and Empirio-Criticism. Drawing on his scientific training, Pannekoek demonstrated that Lenin had misrepresented the epistemological views of his philosophical opponent, Ernst Mach.

The conclusions that Pannekoek drew from Lenins interpretation of Marxist materialism in Materialism and Empirio-Criticismwere more important. Pannekoek sought to argue that Lenin had never been a proper Marxist, since Marxism was the theory of the workers struggle against capitalism, but capitalism as such barely existed in Russia.

He insisted that the French and Russian Revolutions were similar processes, brought about by predominantly pre-capitalist socioeconomic conditions. In Pannekoeks view, both were bourgeois revolutions that had paved the way for the development of capitalism.

For Pannekoek, Lenins views were those of bourgeois materialism, and the Bolshevik revolution had nothing to do with Marxism or socialism. Only in the industrially developed West was a revolution along the lines envisaged by Marx possible. The tension between historical determinism and the importance of ideas and action in Pannekoeks ideas now disappeared as determinism became the dominant element.

An unexpected future

In February 1942, two years before he was due to retire, the German occupation regime ousted Pannekoek from his university position in Amsterdam. He spent the war years writing, composing his memoirs in two parts one covered his years in the workers movement, the other described his life as an astronomer.

Pannekoek no longer enjoyed the fame he had once known in the political world, but his renown as an astronomer had grown during the same period. In 1932, he had become a professor at the university. Initially, his work focused on mapping the Milky Way, mapping stars and determining distances. But he was a pioneer in the field of astrophysics as well, applying new insights from physics to the study of the development of stars.

Pannekoek also won recognition for his detailed drawings of the Milky Way, having travelled to Java in 1926 to facilitate this work. He argued that such drawings constituted a superior way of mapping our galaxy when compared to static photographs, as the human mind could synthesise information from a continuous flow of disparate observations.

During the occupation, Pannekoek began writing a book called The Workers Councils, in which he systematised his later political views. Throughout the work, he made claims and predictions that he then quickly played down. Pannekoek held onto his deterministic view of history but admitted that history had not been working out as he predicted so far.

In a conclusion omitted from the English translation of the work, Pannekoek wrote that the working class had essentially ceased to exist as a class during the Second World War. He argued that it no longer had a will to decide whether or not to follow the bourgeoisie, with any sense of class identity having been washed away by the general submission of all classes to the ideology of capital.

What remained was Pannekoeks faith in the unfolding of history. He argued that a new phase of capitalism would wipe away preexisting traditions, opening peoples minds for the direct effects of new realities so that the idea of workers councils could be revived. Again, history was to disappoint Pannekoek. All we have written in these last few years, he lamented shortly before his death in 1960, remained completely unsold and unread.

Pannekoeks Marxism was characterised by a tension between historical determinism and his emphasis on spirit conscious action and commitment. In his later life, he resolved this tension by subordinating the latter to the former, claiming that spirit would inevitably develop in a specific way as the result of economic developments. Pannekoek, who had a tendency to perceive spirit as a thing in its own right, did not recognise that parties and movements could embody the socialist spirit and kept it alive. The real relations that he had written about in 1909 included such organisations.

When workers moved away from socialism, Pannekoek could only explain it as the result of outdated ideas or the influence of bourgeois ideologies. He did not see the ways in which the working class was divided by structures such as imperialism, colonialism and the nation-state. While Pannekoek eventually found himself overtaken by history, his earlier insights into spirit, self-organisation, and the importance of the socialist goal remain valuable contributions to the movement for working-class emancipation.

Alex de Jong is editor of the socialist journal Grenzeloos and an activist in the Netherlands. This article was first published by Jacobin and has been republished here with permission.

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How Astronomer Anton Pannekoek Planned To Storm the Heavens - The Wire Science

Astronomers are Starting to Understand the Quasar Lifecycle – Universe Today

Supermassive black holes have a complicated lifecycle. Sometimes theyre on, blasting out tremendous amounts of energy, and sometimes theyre off, where they sleep like dragons in their caves. By comparing the proportion of high-energy to low-energy waves emitted by quasars, astronomers are beginning to pin down how many black holes are sleeping, and when theyre likely to wake back up.

Heres how it works. As far as we can tell, every galaxy has a supermassive black hole in its center. When material falls onto this black hole, it compresses and heats up (because the extreme gravity of the black hole is trying to drag a whole bunch of material into a relatively small volume). All that friction drives the release of tons of high-energy radiation, something astronomers call a quasar.

Along with the hard stuff comes radio waves, and we can use radio telescopes like LOFAR (the LOw Frequency ARray) and the WSRT (Westerbork Synthesis Radio Telescope) to detect them.

But the intense radiation blasts material away from the black hole, and it can no longer feed, so the black hole goes to sleep and the quasar shuts off, along with the radio emission.

Astronomers are trying to understand the overall lifecycle, which can take hundreds of millions of years to play out. They want to know how often quasars light up, how long they burn, and when theyre likely to switch on again.

And using a combination of high-frequency and low-frequency radio waves, theyve got a new tool.

High frequency radio waves quickly lose their energywhile those in the lower frequency do so much more slowly, according to Prof. Dr. Raffaella Morganti, first author of the paperThe best of both worlds: Combining LOFAR and Apertif to derive resolved radio spectral index images.

By using different radio telescopes to observe different frequencies of radio waves, and using the combined data to measure the ratio of high-frequency to low-frequency waves, astronomers can tell how recently a quasar shut off: the less of the high-frequency stuff, the more time has passed since the last feeding event.

From there, astronomers can build up a survey of active quasars, silent ones, and all the rest in between.

While powerful, the technique will require new radio surveys to observe as many galaxies as possible, to build up a proper population census of the black holes in our universe.

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Astronomers are Starting to Understand the Quasar Lifecycle - Universe Today

Astronomy surveys aim to up the pace with army of tiny robots – Science Magazine

Hundreds of fibers, arranged by hand, capture light at the Sloan Digital Sky Surveys New Mexico telescope.

By Daniel CleryFeb. 3, 2021 , 3:25 PM

It was one of the stranger and more monotonous jobs in astronomy: plugging optical fibers into hundreds of holes in aluminum plates. Every day, technicians with the Sloan Digital Sky Survey (SDSS) prepped up to 10 plates that would be placed that night at the focus of the surveys telescopes in Chile and New Mexico. The holes matched the exact positions of stars, galaxies, or other bright objects in the telescopes view. Light from each object fell directly on a fiber and was whisked off to a spectrograph, which split the light into its component wavelengths, revealing key details such as what the object is made of and how it is moving.

Now, after 20 years, the SDSS is going robotic. For the projects upcoming fifth set of surveys, known as the SDSS-V, plug plates are being replaced by 500 tiny robot arms, each holding fiber tips that patrol a small area of the telescopes focal plane. They can be reconfigured for a new sky map in 2 minutes. Other sky surveys are also adopting the speedy robots. They will not only save valuable observation time, but also allow the surveys to keep up with Europes Gaia satellite, the upcoming Vera C. Rubin Observatory in Chile, and other efforts that produce huge catalogs of objects needing spectroscopic study. Its driven by the science of enormous imaging surveys, says astronomer Richard Ellis of University College London.

COVID-19 has delayed the SDSSs robotic makeover. The surveys northern telescope at Apache Point Observatory in New Mexico began to take SDSS-V data in October 2020 using plug plates. It aims to switch over to the robots by mid-2021. The southern scope at Las Campanas Observatory in Chile will follow later in the year. Its bananas, says SDSS-V Director Juna Kollmeier of the Carnegie Observatories, but were seeing the end of the tunnel.

The robots mark a new chapter for the SDSS. For 10 years much of its time went to the study of dark energy, the mysterious force that is accelerating the universes expansion. The SDSS prised apart the light of millions of galaxies to determine their distance, via a redshifta Doppler shift in their light due to the expansion of the universe, like the wail of a receding siren. Results from the galaxy survey, released in July 2020, traced the universes expansion back through 80% of its history with 1% precision, confirming the effects of dark energy, perhaps the biggest mystery in cosmology. Cracking it will require looking further back in time to fainter galaxies, which is beyond the capabilities of the surveys 2.5-meter telescopes.

Instead, the scopes will carry out three new surveys. Milky Way Mapper will gather spectra from 6 million stars, probing their composition to find out how long theyve been burning and forging heavy elements. Stars are all clocks, Kollmeier explains. With age estimates, astronomers can work out when parts of the Milky Way formed. Subtle shifts in composition can also reveal whether a group of stars originated in another galaxy or star cluster that has been subsumed into oursan unwinding of Milky Way history called galactic archaeology.

In a second survey, Black Hole Mapper, the optical fibers will gather light from bright galaxies to learn about the supermassive black holes they harbor. Doppler shifts in the spectra of glowing gases surrounding these black holes could reveal how fast they fling this material aroundand thus how heavy they are. Shifts in the spectra could trace how they gobble up and spit out streams of this gas. By tracking the gases over time, Kollmeier says, astronomers may learn how the black holes grow, seemingly in concert with their galaxies.

The third survey, Local Volume Mapper, will bunch fibers together like a multi-pixel detector to get spectra from clouds of interstellar gas within nearby galaxies. Were mapping a whole galaxy in exquisite detail at one time, Kollmeier says. By determining the motions and composition of the gas clouds, the SDSS team hopes to identify why some collapse into stars and others dont.

Meanwhile, the dark energy quest pioneered by the SDSS will move to the Dark Energy Spectroscopic Instrument, a 5000-fiber robotic spectrograph on a 4-meter telescope in Arizona. It will soon begin to track the distances to tens of millions of galaxies in the remote universe.

To speed up the ability to split light from thousands of stars at once, sky surveys are turning to robot-controlled optical fibers.

In the coming months, the William Herschel Telescope, a 4.2-meter telescope in the Canary Islands, will join the robot revolution by sending light to a 1000-fiber spectrograph called the WHT Enhanced Area Velocity Explorer (WEAVE). Instead of using robots to hold fibers in place, WEAVE has two of them working offline, picking and placing magnetic fiber ends onto a metal plateautomating what the SDSSs plate pluggers did. One of WEAVEs goals is to gather Doppler shifts from the billion stars Gaia has mapped, nailing down their full 3D motions. Then, We can run the clock backwards and see where they came from, says project scientist Scott Trager of the University of Groningen. Its another way to do galactic archeology.

Next year, the European Southern Observatorys (ESOs) 4-metre Multi-Object Spectroscopic Telescope in Chile will be fitted with yet another robotic technology. Its 2400 fibers will be fed through controllable spines that stick up into the telescopes focal plane and can be made to move, like wheat stalks in a breeze. Like WEAVE, it will follow up on sources identified by European spacecraft, including Gaia and Euclid, an upcoming dark energy mission.

It and other fiber spectrographs will also help with studies of fast-moving cosmic events such as supernovae or the violent collisions that produce gravitational waves. The Rubin Observatory will spot many of them. From 2023, its expected to detect 10 million fast-changing objects every night. For the thousands that demand scrutiny, spectra are really critical for understanding what a source is, says Eric Bellm of the University of Washington, Seattle, who is the science lead for Rubins alert stream.

Even some of the worlds largest scopes, in the 8-meter range, are adding robotic spectrographs. Japans Subaru and ESOs Very Large Telescope are both developing systems that will vacuum up spectra from faint, distant objects. Ellis says a fiber spectrograph combined with Subarus 8.2-meter mirror would be able to pick out spectra of individual stars in the Andromeda galaxy, the Milky Ways nearby twin. With a big telescope, we can do galactic archaeology in our nearest neighbor, he says.

*Correction, 5 February, 3:10 p.m.:An earlier version of the table in this story misstated the total number of fibers for both of the SDSS-V telescopes.

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Astronomy surveys aim to up the pace with army of tiny robots - Science Magazine

Astronomers are now Finding Planetary Disks Around the Smallest, Least Massive Stars – Universe Today

Astronomers have been watching planetary systems form around sun-like stars for decades. And now, new observations with the ALMA telescope reveal the same process playing out around the smallest, but most common, stars in galaxy.

The smallest stars in the universe, red dwarf stars, are known to have planetary systems, as shown by the famous examples of Proxima b and the TRAPPIST-1 system. But to date, astronomers have never seen one of these stars in the process of actually forming those planets.

But also to date, astronomers havent had ALMA, currently one of the most powerful telescopes in the world. ALMA (the Atacama Large Millimeter/submillimeter Array) is jointly operated by the European Southern Observatory (ESO), by the National Radio Astronomy Observatory (NRAO), and by the National Astronomical Observatory of Japan (NAOJ).The wavelengths of its observations are especially good at observing young planetary systems in the process of forming.

So thats exactly what Nicolas Kurtovic, a PhD student at the Max Planck Institute for Astronomy (MPIA) in Heidelberg, Germany, did, mapping and analyzing six protoplanetary disks around young very low-mass stars (VLMS), which are no bigger than 20% of the mass of the sun.

Despite the tremendous progress in understanding planet formation during recent decades, we dont know much on how the planets of the most common stars form, Kurtovic said.

The observations showed the characteristic ring-like gaps in the disks around some of the young stars, which is a telltale sign of planet formation.

This pilot study was a challenging task because the VLMS disks are small and possess relatively little material, resulting in feeble signals that are very hard to detect, said Dr. Paola Pinilla. Pinilla leads a research group at MPIA titled The Genesis of Planets in which Kurtovic is a member.

These are crucial and very lucky observations, because the dust an essential ingredient for seeding the formation of planets tends to migrate inwards towards a young star, where its obliterated (and isnt much use in building planets). For VLMS, this process can happen up to twice as fast as a sun-like star, shutting down planetary formation before it even starts.

However, these observations show that its still quite possible, leading to systems like Proxima b and TRAPPIST-1.

We still do not know how common planets around red dwarf stars are, Kurtovic conceded. However, the longevity of red dwarf planetary systems is intriguing concerning habitability and hypothetical civilizations, he added.

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Astronomers are now Finding Planetary Disks Around the Smallest, Least Massive Stars - Universe Today

Astronomers find origins of "galactic cannibalism" with discovery of ancient dark matter halo – CBS News

Astronomers have detected what they believe to be one of the earliest instances of "galactic cannibalism" when one galaxy consumes one of its smaller neighbors in an ultrafaint dwarf galaxy called Tucana II. The findings stem from the discovery of an ancient dark matter halo, located in a galaxy 163,000 light years from Earth.

Tucana II is just one of dozens of dwarf galaxies surrounding the Milky Way. Theyare thought to be artifacts left over from the first galaxies in the universe and Tucana II is among the most primitive of them.

In a new study, published Monday in the journal Nature Astronomy, astrophysicists report detecting nine previously unknown stars at the edge of Tucana II, using the SkyMapper Telescope in Australia and the Magellan Telescopes in Chile. The stars are shockingly far away from its center but remain in the small galaxy's gravitational pull.

The configuration of stars provides the first evidence that the galaxy contains an extended dark matter halo a region of matter three to five times larger than scientists originally believed in order to keep a gravitational hold on its distant stars. The findings suggest that the earliest galaxies in the universe were much more massive than previously believed.

"Tucana II has a lot more mass than we thought, in order to bound these stars that are so far away," one of the authors of the study, MIT graduate student Anirudh Chiti, said in a statement. "This means that other relic first galaxies probably have these kinds of extended halos too."

Every galaxy is believed to be held together by a halo of dark matter, a type of hypothetical matter thought to make up over 85% of the universe, MIT News explains. But the new findings represent the first time one has been detected in an ultrafaint dwarf galaxy.

"Without dark matter, galaxies would just fly apart," Chiti said. "[Dark matter] is a crucial ingredient in making a galaxy and holding it together."

Scientists also found that these far-flung stars are older than the stars at Tucana II's core the first evidence of such an imbalance in this type of galaxy. Their discovery points to the possibility that the galaxy could be the product of one of the first mergers between two galaxies in the universe, which scientists refer to as "galactic cannibalism."

"We may be seeing the first signature of galactic cannibalism," said MIT Professor Anna Frebel. "One galaxy may have eaten one of its slightly smaller, more primitive neighbors, that then spilled all its stars into the outskirts."

Using a telescope's imaging filter, astronomers are able to study the metal content of a galaxy's stars to determine just how primitive it is. They had previously found stars at Tucana II's core with such low metal content that the galaxy was identified as the most chemically primitive of the known ultrafaint dwarf galaxies.

New research found the outer stars were three times more metal-poor than the ones at the center, making them even more primitive.

"This probably also means that the earliest galaxies formed in much larger dark matter halos than previously thought," Frebel said. "We have thought that the first galaxies were the tiniest, wimpiest galaxies. But they actually may have been several times larger than we thought, and not so tiny after all."

An early galactic merger is one likely explanation for the imbalance. Galactic cannibalism occurs "constantly" across today's universe, according to MIT News, but mergers in the early universe are not so certain.

"Tucana II will eventually be eaten by the Milky Way, no mercy," Frebel said. "And it turns out this ancient galaxy may have its own cannibalistic history."

The team hopes to use their approach to discover even older, more distant stars in other ultrafaint dwarf galaxies.

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Astronomers find origins of "galactic cannibalism" with discovery of ancient dark matter halo - CBS News

Astronomers identified a piece of the Milky Ways missing matter – Tech Explorist

The majority of the universes mass is believed to be mysterious dark matter and dark energy. 5 percent is normal matter that makes up stars, planets, asteroids, etc. This is known as baryonic matter.

For quite a long time, researchers have been puzzled about why they couldnt represent all the matter in the universe as anticipated by hypothesis.

For the first time, Astronomers used distant galaxies as scintillating pins to locate and identify a piece of the Milky Ways missing matter.

Yuanming Wang, a doctoral candidate in the School of Physics at the University of Sydney, has developed an ingenious method to track down the missing matter. Using the technique, Wang pinpointed a hitherto undetected stream of cold gas in the Milky Way about ten light-years from Earth.

The cloud is about a trillion kilometers long and 10 billion kilometers wide but only weighing about our Moons mass.

Ms. Wang, who is pursuing her Ph.D. at the Sydney Institute for Astronomy, said, We suspect that much of the missing baryonic matter is in the form of cold gas clouds either in galaxies or between galaxies.

This gas is undetectable using conventional methods, as it emits no visible light of its own and is just too cold for detection via radio astronomy.

Astronomers observed radio sources in the distant background to see how they shimmered. They discovered five twinkling radio sources on a giant line in the sky.

Their analysis also shows that their light must have passed through the same cold clump of gas.

When visible light is distorted while passing through the atmosphere, it gives stars their twinkle. Similarly, when radio waves pass through the matter, it affects their brightness. It was that scintillation that Ms. Wang and her colleagues detected.

Dr. Artem Tuntsov, a co-author from Manly Astrophysics, said: We arent quite sure what the strange cloud is, but one possibility is that it could be a hydrogen snow cloud disrupted by a nearby star to form a long, thin clump of gas.

According to theorists, some of the universes missing baryonic matter could be locked up in these hydrogen snow clouds. They are almost impossible to detect directly.

Ms. Wang said, However, we have now developed a method to identify such clumps of invisible cold gas using background galaxies as pins.

Professor Tara Murphy said: This is a brilliant result for a young astronomer. We hope the methods trailblazed by Yuanming will allow us to detect more missing matter.

For the study, scientists gathered the CSIROs Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope in Western Australia.

Dr. Keith Bannister, Principal Research Engineer at CSIRO, said: It is ASKAPs wide field of view, seeing tens of thousands of galaxies in a single observation that allowed us to measure the shape of the gas cloud.

Professor Murphy said: This is the first time that multiple scintillators have been detected behind the same cloud of cold gas. In the next few years, we should be able to use similar methods with ASKAP to detect a large number of such gas structures in our galaxy.

Ms. Wangs discovery adds to a growing suite of astronomers tools in their hunt for the universes missing baryonic matter. This includes a method published last year by the late Jean-Pierre Macquart from Curtin University, who used CSIROs ASKAP telescope to estimate a portion of matter in the intergalactic medium using fast radio bursts as cosmic weigh stations.

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Astronomers Think They’ve Found Another Trojan Asteroid Lurking in Earth’s Orbit – ScienceAlert

A recently discovered object sharing Earth's orbital path around the Sun could actually be a trojan asteroid, astronomers have found.

If confirmed, it will be only the second object of its type identified to date, suggesting that there could be more of these hidden asteroids lurking in Earth's gravitational pockets.

Trojan asteroids are space rocks that share the orbital path of larger planetary bodies in the Solar System, hanging out in gravitationally stable regions known as Lagrangian points.

These are pockets where the gravitational pulls of the planet and the Sun balance perfectly with the centripetal force of any small body in that region to basically hold it in place.

Each two-body system has five Lagrange points, as seen in the diagram below. There are five between Earth and the Moon; and another five between Earth and the Sun.

These are really quite useful, actually we can put spacecraft in them and be reasonably confident they will stay put. The James Webb Space Telescope, for instance, will be going in the Earth-Sun L2 Lagrangian.

(NASA/WMAP Science Team)

Lagrangians, however, can also capture space rocks, and the phenomenon is well-known in the Solar System.

Jupiter has the most trojans, with well over 9,000 documented, but the other planets are not going without. Neptune has 28, Mars has 9, and both Uranus and Earth have one confirmed apiece.

Earth's confirmed trojan, named 2010 TK7, is a chunk of rock around 300 metres (984 feet) across, hanging about the Earth-leading L4 Lagrangian in an oscillating tadpole-shaped orbit known as libration.

The new object, named 2020 XL5, which was first observed in November and December of last year, seems similar.

According to amateur astronomer Tony Dunn, who calculated the object's trajectory using NASA's JPL-Horizons software, it, too, librates around the Earth-Sun L4 Lagrangian, looping close to the orbit of Mars, and intersecting the orbit of Venus.

In the gif below, the asteroid's orbit is in teal, with Earth in blue and Mars in orange. Venus and Mercury are both white.

(Tony Dunn/Twitter)

Because it draws so near to Venus, if 2020 XL5 is a trojan, it may not be stable on long timescales. According to simulations run by Dunn, for a few thousand years, the asteroid will pass above and below the orbital plane of Venus when it intersects, keeping the planet from disrupting its orbit.

Eventually, however, gravitational interactions should move it away from the L4 point. This is supported by simulations run by amateur astronomer Aldo Vitagliano, creator of the Solex and Exorb orbital determination software.

"I can confirm that 2020 XL5 is presently a moderately stable Earth Trojan (I mean stable on a time scale of 2-4 millennia)," he wrote on the Minor Planets Mailing List.

"I have downloaded the nominal elements and their covariance matrix from the Neodys site, thereby generating 200 clones of the body. All the 200 clones, integrated up to AD 4500, although becoming spread over an orbital arc of more than 120 degrees, keep librating around the L4 point. The first clone jumps over the L3 point around year 4500, and by year 6000 many of them have done the jump and a few of them are librating around the L5 point."

2010 TK7 isn't necessarily stable in its current position long-term, either. A 2012 analysis found that it only became a trojan around 1,800 years ago, and will likely move away from the L4 point in about 15,000 years, into a horseshoe-shaped orbit, or into L5.

Although only one more data point, 2020 XL5 could help us figure out how to search for other potential Earth trojans. We have done so both the OSIRIS-REx and Hayabusa2 spacecraft scanned the L4 and L5 points respectively in 2017 while en route to their respective targets, but found nothing. Searches from Earth have been nearly as fruitless.

That is not necessarily surprising. Any objects inhabiting the Lagrangians would be moving around a lot, leaving a very large patch of sky to scour looking for relatively small objects. From Earth, also, the placement with respect to the Sun makes detection challenging.

Scientists have ruled out a stable population of primordial trojans hiding since the beginning of the Solar System.

Nevertheless, even with current observational limitations, scientists have estimated that we could be able to detect hundreds of Earth trojans comparable in size to 2010 TK7. Gaining a better idea of how they move around the Lagrangians could help us narrow down where in the sky to look.

What we find whether it's a whole bunch of trojans, or a whole bunch of nothing is bound to tell us more about the dynamics of our Solar System.

H/T: Sky & Telescope

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Astronomy on Maunakea and in Hawaii will be put at significant risk, UH says of request for new governance – KHON2

Posted: Feb 3, 2021 / 12:08 PM HST / Updated: Feb 3, 2021 / 06:35 PM HST

Courtesy Maunakea Observatories.

HONOLULU (KHON2) In a House Chamber meeting on Tuesday, House Speaker Scott Saiki called for an end to University of Hawaiis management of Maunakea.

[Hawaii news on the goLISTEN to KHON 2GO weekday mornings at 7:30 a.m.]

In his speech, the speaker announced that the house would be looking into legislation that pushes for a new governance structure of Maunakea. The University of Hawaii, who conducts astronomy research atop the mauna, currently holds a master lease of the land. That lease is set to expire in 2033.

The University of Hawaii has held the master lease to manage the astronomy precinct and the natural, cultural and preservation area since 1968, said Speaker Saiki. The master lease is set to expire in 2033 and the University is currently working to extend it. The University has tried to manage Maunakea, but for too long the Universitys work has been shrouded by its inability to appropriately manage cultural practices, resources and education. This is why the University of Hawaii must no longer manage Maunakea and it should cease its work to extend the master lease.

In a news release sent out just one day after the speakers announcement, the University said it will continue to work to improve stewardship of Maunakea but that it believes a new governance is not the answer.

The University of Hawaii remains steadfast in its commitment to continue to improve stewardship of Maunakea. The University is willing to work with anyone to honor that commitment, which includes considering different governance structures, said a spokesperson for the University.

The University says the legislature has proposed similar ideas in the past with no real result stemming from them, except for hindering the efforts of the observatories to secure proper sponsorship and funding for continued astronomy research.

It will take substantial time to reach an agreement on a new approach, if that can be done. If a new organization is recommended, it will need to be created and funded, and even if it already exists it will have substantial work to complete the necessary plans, assessments and approvals, UH said.

In its commentary, the University added that those who oppose the development of the thirty meter telescope on Maunakea will most likely continue to oppose it regardless of a new governance or land manager. UH highlighted past achievements, including an internal restructuring and community outreach, that the school says shows responsible stewardship of Maunakea.

Meanwhile, Speaker Saiki says the legislature will work with advocacy group, Ku Kiai Maunakea, in its efforts to pursue a new governance.

To read the University of Hawaiis full news release, click here.

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Astronomy on Maunakea and in Hawaii will be put at significant risk, UH says of request for new governance - KHON2

Explore Scientific, the Explore Alliance, and Astronomy Magazine Team Up for Global Star Party Celebrating Pluto – Yahoo Finance

TipRanks

Weve got a full month of 2021 behind us now, and a few trends are coming clearer. The coronavirus crisis may still be with us, but as vaccination programs expand, the end is in sight. With President Trump out of the picture, and the Democrats holding both Houses of Congress and the White House, politics is looking more predictable. And both of those developments bode well for an economic recovery this year. Looking back, at the year that was, we can also see some trends that stayed firm despite the pandemic, the shutdowns, and the supercharged election season. One of the most important is the ongoing rollout of 5G networking technology. These new networks bring with them a fuller realization of the promises inherent in the digital world. Faster connections, lower latency, higher online capacity, clearer signals all will strongly enhance the capabilities of the networked world. And it wont just be mundane things like telecommuting or remote offices that will benefit 5G will allow Internet of Things and autonomous vehicles to further develop their potential. There is even talk of medical applications, of remotely located doctors performing surgery via digitally controlled microsurgical tools. And these are just the possibilities that we can see from now. Who know what the future will really bring? To this end, we pulled up TipRanks database to learn more about three exciting plays in the 5G space. According to the Street, we are likely to see further interesting developments in the next few years as this technology takes over. Skyworks Solutions (SWKS) The first 5G name were looking at, Skyworks, is a semiconductor chip manufacturer that brought in $3.4 billion in total revenues for FY2020. Skyworks, which is a prime supplier of chips for Apples iPhone series, saw a massive 68% year-over-year increase in 1QFY21 revenues the top line reached $1.51 billion, a company record, and also much higher than analysts had forecast. Much of Skyworks fiscal Q1 sales success came after Apple launched the 5G-capable iPhone 12 line. Strong sales in the popular handset device meant that profits trickled down the supply line and Skyworks channels a disproportionate share of its business to Apple. In fact, Apple orders accounted for 70% of Skyworks revenue in the recent quarter. iPhone wasnt the only 5G handset on the receiving end of Skyworks chips, however the company is also an important supplier to Koreas Samsung and Chinas Xiaomi, and has seen demand rise as these companies also launch 5G-capable smartphones. Finally, Skyworks supplies semiconductor chip components to the wireless infrastructure sector, specifically to the small cell transmission units which are important in the propagation network of wireless signals. As the wireless providers switch to 5G transmission, Skyworks has seen orders for its products increase. In his note on Skyworks for Benchmark, 5-star analyst Ruben Roy writes: SWKS significantly beat consensus estimates and provided March quarter guidance that is also well ahead of consensus estimates as 5G related mobile revenue and broad-based segment revenue continued to accelerate In addition to continued strength of design win momentum and customer activity, we are encouraged with SWKS confident tone relative to the overall demand environment and content increase opportunities. In line with his comments, Roy rates SWKS a Buy along with a $215 price target. At current levels, this implies an upside of 20% for the coming year. (To watch Roys track record, click here) Roy is broadly in line with the rest of Wall Street, which has assigned SWKS 13 Buy ratings and 7 Holds over the past three month -- and sees the stock growing about 15% over the next 12 months, to a target price of $205.69.(See SWKS stock analysis on TipRanks) Qorvo, Inc. (QRVO) Qorvos chief products are chipsets used in the construction of radio frequency transmission systems that power wifi and broadband communication networks. The connection of this niche to 5G is clear as network providers upgrade their RF hardware to 5G, they also upgrade the semiconductor chips that control the systems. This chip maker has a solid niche, but it is not resting on its laurels. Qorvo is actively developing a range of new products specifically for 5G systems and deployment. This 5G radio frequency product portfolio includes phase shifters, switches, and integrated modules, and contains both infrastructure and mobile products. Qorvo posted $3.24 billion in total revenues for fiscal 2020. That revenue represents a 4.8% year-over-year increase and the companys sales have been accelerating in fiscal 2021. The most recent quarterly report, for the second fiscal quarter, showed $1.06 billion in revenues, a 31% yoy increase. Rajvindra Gill, 5-star analyst with Needham, is bullish on Qorvos prospects, noting: Qorvo reported strong sales and gross margins as 5G momentum rolls into CY21 on atypical seasonality... The company is planning for 500M 5G handsets to be manufactured in 2021, with an incremental $5-7 of content/unit from 4G to 5G. Management believes that ultra-wideband adoption will be a key growth driver in for smartphones going forward..." To this end, Gill puts a $220 price target on QRVO shares, suggesting room for 31% upside in 2021. Accordingly, he rates the stock a Buy. (To watch Gills track record, click here) What do other analysts have to say? 13 Buys and and 6 Holds add up to a Moderate Buy analyst consensus. Given the $192.28 average price target, shares could climb ~15% from current levels. (See QRVO stock analysis on TipRanks) Telefonakiebolaget LM Ericsson (ERIC) From chipsets, well move on to handsets. Ericsson, the Swedish telecom giant has long been a leader in mobile tech, and is well known for its infrastructure and software that make possible IP networking, broadband, cable TV, and other telecom services. Ericsson is the largest European telecom company, and the largest 2G/3G/4G infrastructure provider outside of China. But that is all in the background. Ericsson is also a leader in the rollout of Europes growing 5G networks. Ericsson is involved in 5G rollout in 17 countries in Europe, the Americas, and Asia, and its product line includes infrastructure base units and handsets, giving the company an interest in all aspects of the new 5G networks. Ericssons revenue performance in 2020 was not notably distressed by the corona crisis. Yes, the top line dipped in Q1, but that was in line with the companys historical pattern of rising revenue from Q1 through Q4. While the companys 1H20 revenues showed small yoy declines, the 2H20 gains were higher. In Q3, the $6.48 billion top line was up 8.7% yoy, and Q4s $8.08 billion revenue was up 17% from the prior year. The companys shares have also performed well during the corona year, and show a 12 month gain of 64%. Raymond James 5-star analyst Simon Leopold bluntly assigns Ericssons recent gains to its participation in 5G rollouts. Japan's awaited 5G roll-out has started. Share gains continue as Ericsson benefits from challenges facing its biggest competitors and more operators embrace 5G it seems obvious that Ericsson should be gaining market share... Competitor Nokia shunned the Chinese 5G projects, citing profitability challenges, yet Ericsson appears to be profiting in the challenging region. Leopold rates this stock an Outperform (i.e. Buy), and his $15 price target implies an upside potential of ~14% for the year ahead. (To watch Leopolds track record, click here) The Raymond James analyst, while bullish on ERIC, is actually less so than the Wall Street consensus. The stock has a Strong Buy consensus rating, based on a unanimous 5 reviews, and the $16.50 average price target indicates 25% growth potential from the share price of $13.19. (See ERIC stock analysis on TipRanks) To find good ideas for 5G stocks trading at attractive valuations, visit TipRanks Best Stocks to Buy, a newly launched tool that unites all of TipRanks equity insights. Disclaimer: The opinions expressed in this article are solely those of the featured analysts. The content is intended to be used for informational purposes only. It is very important to do your own analysis before making any investment.

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Explore Scientific, the Explore Alliance, and Astronomy Magazine Team Up for Global Star Party Celebrating Pluto - Yahoo Finance

A blue bolt out of the blue: On the edge of space, lightning leaps *upward* – SYFY WIRE

Chances are, you've seen, heard, or felt a lightning bolt erupt in the sky somewhere near you. After all, there are well over a billion lightning flashes on Earth per year. That's about four dozen per second, somewhere over our planet (sometimes in one spot, where an astronomer with a phonecam can get video).

Thunderstorms are a common feature of our planet, and the electrical fields therein are the root source of the power of lightning. But they also generate other phenomena, too, ones that we're just starting to learn about.

One of the most mysterious of these is a blue flash. As the name says, these are intense, short blasts of blue light that occur near the tops of storm clouds, and last for only ten microseconds (one one-hundred-thousandth of a second). They sometimes trigger blue jets: upward-reaching tendrils that last for perhaps a few tenths of a second. These pulsate with energy as they go from being narrow channels to fanning out into wide cones as they propagate into the stratosphere, 1020 kilometers above the ground. But we don't know a huge amount about them.

Because they happen above the clouds, it's hard to see them from the Earth's surface. That's why scientists built a device called the AtmosphereSpace Interactions Monitor (or ASIM), which is mounted on the outside of one of the modules on the International Space Station (ISS). It looks to the Earth below, and can take data at 10 microsecond intervals, allowing these weird phenomena to be studied.

On February 26, 2019, a thunderstorm brewed in the South Pacific Ocean near the equator. The ISS passed almost directly over it, giving ASIM an incomparable view. Happily, the storm didn't disappoint: Five blue flashes were seen, including one that generated a blue jet.

The flashes occurred 16 kilometers above the ocean, near the center of the storm where deep convection was seen this is the rising and falling of air inside the cloud, which is how the strong electric fields inside are generated. These flashes may be from electrons accelerated to high speed inside the cloud slamming into nitrogen molecules in the air, which respond by emitting ultraviolet and blue light.

When this happens, the air becomes ionized electrons are stripped from the molecules creating a channel in the air that can conduct electricity. There's a huge charge difference between the top of a cloud and the air above it, and if conditions are just right, that blue flash can create a blue jet, a tremendous but narrow discharge of electricity upwards into the sky (similar to a lightning leader). The one seen by ASIM stretched about 50 kilometers up.

There was also a very faint red pulse at the start of the flash, which may have been the start of the leader, the first ionized channel carved upward, probably a few hundred meters long. This is also due to electrically excited nitrogen gas emitting light as well (the same reason some aurorae are red).

The blue flashes did more than make a blue jet, too: They made ELVES, which stands for get this Emission of Light and Very low frequency perturbations due to Electromagnetic pulse Sources. A blue flash strongly accelerates electrons, which in turn generate powerful pulses of radio waves. These pulses move upwards into the ionosphere (80 kilometers or more above Earth's surface) which themselves accelerate electrons there. This creates rapidly expanding rings of blue and ultraviolet light as the pulse propagates horizontally at the bottom of the ionosphere, like a ripple moving away from a rock dropped into a pond.

I know, this is all quite complicated, but that's part of the point. The theory is partly there, but scientists have lacked observations to back them up. These ASIM observations really help.

Mind you, there are lots of other bizarre phenomena generated in clouds you may not have heard of. Terrestrial gamma-ray flashes, for example, are blasts of extremely high-energy photons out of the tops of thunderstorms, generated when electrons in the cloud are accelerated to nearly the speed of light and then interact with molecules of air. Maybe; the details of these flashes also aren't well understood even though they've been studied for decades.

There are also red sprites, which are tendril-like features that flash upwards from the tops of clouds. Pilots had reported seeing them for years but they were never caught in photos, so scientists were perhaps overly skeptical. In the 1990s these faint flashes started turning up in digital images, and now they're understood more or less in general. They're on my bucket list of Things I Want To See For Myself, but it's hard; since they appear over storms you have to be far enough away to see above the storm, and they're faint. We do see enormous storms to our east in the summer, and at some point I'll see about trying for them.

I know I usually write about mysterious objects and phenomena quadrillions of kilometers away, but there's a lot of very cool stuff going on much closer to us. It's not technically astronomy, but hey, it's still over our heads. Unless you're ASIM, looking down on Earth. But that's just a matter of perspective.

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A blue bolt out of the blue: On the edge of space, lightning leaps *upward* - SYFY WIRE

Astronomers Can Predict When a Galaxys Star Formation Ends Based on the Shape and Size of its Disk – Universe Today

A galaxys main business is star formation. And when theyre young, like youth everywhere, they keep themselves busy with it. But galaxies age, evolve, and experience a slow-down in their rate of star formation. Eventually, galaxies cease forming new stars altogether, and astronomers call that quenching. Theyve been studying quenching for decades, yet much about it remains a mystery.

A new study based on the IllustrisTNG simulations has found a link between a galaxys quenching and its stellar size.

About 10 billion years ago, the Universe was in what cosmologists call the Cosmic Noon. That was when star formation in galaxies peaked. How and why galaxies stop forming stars since then has been mysterious.

In a new paper titled MOSEL and IllustrisTNG: Massive Extended Galaxies at z = 2 Quench Later Than Normal-size Galaxies, a team of researchers wanted to examine quenching. The lead author of the study is Dr. Anshu Gupta of Australias ARC Centre of Excellence in All Sky Astrophysics in 3 Dimensions (ASTRO 3D). The paper will be published in The Astrophysical Journal.

Theres a period in the life of the Universe known as the cosmic noon, which occurred about 10 billion years ago, said Dr. Gupta in a press release. That was when star formation in massive galaxies was at its peak. After that, gas in most of these galaxies grew hot in part because of the black holes in the middle of them and they stopped forming stars.

Cosmic noon also saw galaxies develop the characteristics we see today: regular rotating disk and bulges, for instance. That was also when a population of dead galaxies, or quenched galaxies, started to emerge. Something was going on.

Cosmic noon wasnt only a period of peak star formation. It was also a period of peak black hole accretion. As the black holes at the center of galaxies grew more massive, they drew the galaxys gas towards them, compressing and heating the gas. But stars need cold gas to form; hot gas refuses to coalesce and collapse into a star.

But this compression and heating effect didnt dominate all galaxies. For a puffier, less dense galaxy with more space between stars, the black holes didnt have the same effect. They couldnt reach enough of the gas to quench star formation.

In galaxies that are really, really stretched out, however, we found that things didnt heat up as much and the black holes didnt exert such a great influence, so stars kept getting made over a longer period.

The team of researchers focused on whats called the galactic disk. The galactic disk is a flattened circular region surrounding the nucleus, and it contains stars, gas, and dust. If that disk is spread out instead of compact, then star formation persists, and quenching is delayed.

Where the stars in the disk are widely distributed you could call it puffy the gas stays cooler, so continues to coalesce under gravity and form new stars, said Dr. Gupta. In galaxies with more compact disks, the gas heats up quite quickly and is soon too energetic to mash together, so the formation of stars finishes by just after cosmic noon. Puffy disks keep going much longer, say as far as cosmic afternoon tea.

Their study found that by z=1, only 36% of extended massive galaxies had become quenched, while 69% of the more normal size massive galaxies had become quenched. By z=2 to 4, they found that normal-size massive galaxies build up their central stellar mass without a significant increase in their stellar size. But for extended massive galaxies, their stellar mass nearly doubled.

This research relied on both observations and simulations.

The IllustrisTNG simulations were an ambitious effort involving mostly German and American scientists. The IllustrisTNG website describes the effort best: Each simulation in IllustrisTNG evolves a large swath of a mock Universe from soon after the Big-Bang until the present day while taking into account a wide range of physical processes that drive galaxy formation. The simulations can be used to study a broad range of topics surrounding how the Universe and the galaxies within it evolved over time.

So what do these results mean? The results mean that for the first time weve been able to establish a relationship between disk size and star-making. So now astronomers will be able to look at any galaxy in the Universe and accurately predict when it will stop making stars just after lunch, or later in the cosmic afternoon.

The Milky Way is humanitys home. Where does our galaxy fit in all this? The Milky Way is a late bloomer, as it turns out. It was here at cosmic noon, but it was still very small and decidedly un-massive. At that point in time, it had only one-tenth of the star mass it has now. Its grown more massive over time, thanks to mergers. Now its a massive galaxy, but its still making stars.

So where are we now in the cosmic-galactic day timer? Cosmic noon was a long time ago, said Dr Gupta. Id say that by now the Universe has reached cosmic evening. Its not night-time yet, but things have definitely slowed down.

The team behind this study integrated the IllustrisTNG simulations with observations from the Multi-Object Spectroscopic Emission Line (MOSEL) Survey. MOSEL relied on the Hubble Space Telescope and the W.M. Keck Observatory. The team included scientists from the UK, Germany, Mexico, the USA, and Australia.

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Astronomers Can Predict When a Galaxys Star Formation Ends Based on the Shape and Size of its Disk - Universe Today