Category Archives: Space Station

International Space Station Protein Crystal Growth #NASA
This animation explains how protein crystal growth investigations performed in the microgravity environment of the International Space Station enable more pe...

By: w1TenMinutes

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International Space Station Protein Crystal Growth #NASA - Video

NanoRacks CubeSat Deployer Program-1 releasing satellites from the ISS
Video of NanoRacks CubeSat Deployer Program-1 showing launch of multiple NanoRacks customer CubeSats into low earth orbit from the International Space Statio...

By: NanoRacks

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NanoRacks CubeSat Deployer Program-1 releasing satellites from the ISS - Video

Name that mission
ESA astronaut Andreas Mogensen is asking for your help with naming his 10-day flight in space. Andreas will be venturing to the International Space Station n...

By: European Space Agency, ESA

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Name that mission - Video

Space Station Live: Cold Atom Laboratory Mission
Public Affairs Officer Lori Meggs at the Marshall Space Flight Center in Huntsville, Alabama spoke with NASA Jet Propulsion Laboratory scientists Anita Sengu...

By: ReelNASA

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Space Station Live: Cold Atom Laboratory Mission - Video

International Space Station Astronaut NA1SS downlink 145.800 mhz FM 03/05/2014
I knew of this event in advance but completely missed 90% of the down link.Next time maybe a note on my computer screen!! At the time I was trying to work 14...

By: Jim Z

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International Space Station Astronaut NA1SS downlink 145.800 mhz FM 03/05/2014 - Video

Linkin Park - Space Station [HD/HQ] Stagelight Demos
3. song from the demo-album "Stagelight Demos" Enjoy it!! ------------- All rights are at Warner Musik Group (WMG) ------------------------------------------...

By: GermanLinkinParkTV

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Linkin Park - Space Station [HD/HQ] Stagelight Demos - Video

Spacebase DF-9 - #03 - There is no reactor
These are the adventures of the brave crew working on the recently opened space station in the Wobbly Zone. Will they survive and expand their base or will t...

By: Learning by Gaming

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Spacebase DF-9 - #03 - There is no reactor - Video

The Best View from Space? | Space Week Live | Channel 4
http://www.channel4.com/space Starts Wednesday 12th March - Sunday 16th March Billion dollar views from the ISS, don #39;t miss this once in a lifetime opportuni...

By: Channel 4

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The Best View from Space? | Space Week Live | Channel 4 - Video

Kerbal Space Program - Docking with my Kerbian International Space Station
I managed to get my plane out in orbit, and rendevous with my spacestation, now its just the docking that remains. This video consist of the 3.000mtrs into f...

By: LSvarstad

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Kerbal Space Program - Docking with my Kerbian International Space Station - Video

The onboard Alpha Magnetic Spectrometer has detected what is thought to be dark matters signature antimatter particles, but it cannot yet pin down their origin

AMS/NASA

A $2-billion particle detector mounted on the International Space Station has registered an excess of antimatter particles in space, the experiments lead scientist announced April 3. That excess could come from fast-spinning stellar remnants known as pulsars and other exotic, but visible sources within the Milky Way galaxy. Or the antiparticles might have originated from the long-sought dark matter, the hypothetical massive particles that constitute some 27 percent of the universe.

Dark matter makes its presence felt by its gravitational pull, but exactly what it is has remained a puzzle. Some popular explanations for dark matters identity suggest that when two dark-matter particles collide, they annihilate to produce antimatter electrons, or positrons. The Alpha Magnetic Spectrometer (AMS), delivered to the space station in 2011 during the penultimate space shuttle mission, was built to detect positrons and other high-energy particles streaming through space, in part to investigate the nature of dark matter. The detector has now collected some 25 billion cosmic-ray particles, including 6.8 million electrons and positrons. The fraction of positrons in the particle mix exceeds what would be naively expected in the absence of dark matter or other unaccounted sources, but the new data lack a distinctive feature predicted of dark matter annihilations.

Dark matter collisions would produce relatively more high- than moderate-energy positrons. But the rise in positrons with increasing energy would continue only up to a point. Beyond a certain energy level, the number of positrons would fall off steeply, AMS spokesperson and Nobel laureate Samuel Ting of the Massachusetts Institute of Technology explained in a seminar at CERN, the European laboratory for particle physics. The positrons could also come from nearby pulsars, and in such a case the positrons will have a slow drop-off at higher energies, Ting said. So the way they drop off tells you everything.

The AMS data indeed show an increasing share of positrons toward higher energies, but no drop-off, so the origin of the excess particles remains unclear. The European PAMELA mission and NASAs Fermi spacecraft have found similar trends in recent years, but Ting called AMS the first experiment to probe in detail the nature of this excess with high sensitivity and precision. The research will appear in the April 5 issue of Physical Review Letters.

Ting only presented data on positrons with energies of about 350 giga-electron-volts or less but said that AMS will in the coming years catalogue particles up to 1,000 giga-electron volts. So the experiment may soon reveal or disprove the presence of a positron cutoff at higher energies, which would provide a clue to the source of the particles: a steep drop would point to dark matter, and a gradual decline would indicate pulsars are the originators of the positrons.

When pressed by colleagues at the CERN seminar to discuss any data AMS has already collected on higher-energy particles, Ting demurred. We will publish things when we are absolutely sure, he said, repeatedly sounding notes of caution and calling for patience. I think that no one is foolish enough to repeat what we are doing, he said of the experiment, which was some 18 years in the making. So we want to make sure we are doing it correctly.

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Dark Matter Signal Possibly Registered on International Space Station