Category Archives: Transhuman News

Its not something students get to see every day: an astronaut, on screen and transmitting from space, demonstrating in real-time weightlessness and conversing with them.

On Thursday morning, students from one sixth-grade science class and one seventh-grade science class at Fall Rivers Talbot Innovation Middle School got to talk with NASA astronaut and flight engineer Chris Cassidy.

Cassidy is currently orbiting Earth aboard the International Space Station. He occasionally did flips and let his microphone float in front of him, and he answered the wide variety of questions students asked him.

Talbot science teacher Ben Squire, instrumental in organizing the event, introduced the class to Cassidy.

Some questions were scientific for example, weight versus mass. Others were about how long the trip was from Earth to outer space.

Normally, the trip from the ground to the space station would take two days. This expedition took only six hours.

The flight from the ground to the edge of the atmosphere lasts for only eight and a half to nine minutes, Cassidy explained. Then the ship is safely in orbit.

The difficulty is boarding the space station, which moves through space at a speed of 17,500 mph about five miles a second.

Cassidy compared it to a quarterback throwing a pass and hitting a fast-moving target perfectly.

NASA scientists use complex calculation and geometry to compute when targets can be hit. It usually takes about two days to get from the ground to the station, but Cassidys recent trip to station in March lasted only six hours under the right conditions. He and Russian cosmonauts Pavel Vinogradov and Alexander Misurkin launched from Kazakhstan.

Continued here:
Astronaut aboard space station answers Talbot students' questions

Clear skies and a passing space station combined for an extraordinary view of Alaska's erupting Pavlof volcano on May 18.

An astronaut aboard the International Space Station snapped a photo of ash streaming from the fiery peak in the Aleutian Islands, about 625 miles (1,000 kilometers) southwest of Anchorage.

Before Mount Pavlof started erupting on May 13, the volcano was as snowy white as its twin, Pavlof Sister, seen sitting directly northeast of the active volcano in the astronaut picture. The combination of melting ice and snow, volcanic gases and lava has sent pyroclastic flows racing down Pavlof's slopes, seen in earlier satellite images tracking the eruption. Pyroclastic flows are lethally hot, superfast flows of gas and rock fragments.

Satellites and earthquake monitors help scientists at the Alaska Volcano Observatory (AVO) track the ongoing eruption at Pavlof and the more than 30 active volcanoes in Alaska, many of which are far from towns, but can threaten planes with their ash. America's biggest state relies on small planes to ferry people and supplies to remote villages, and international cargo travels from Anchorage to Asia. When clouds hide the ash cloud, satellite heat imagery and seismic tremors help researchers confirm volcanoes such as Pavlof are still actively erupting. Local pilots also call in reports of ash and gas plumes to AVO scientists.

Pavlof's ash column has reached as high as 22,000 feet (7,000 meters), forcing regional airlines to occasionally delay or cancel flights to local villages and towns. Ashfall has been reported in nearby communities, including Sand Point, Nelson Lagoon, King Cove and Cold Bay, according to the AVO.

Scientists are also monitoring an ongoing eruption at Cleveland volcano farther to the west in the Aleutian Islands. With no seismic network at the remote site, scientists rely on satellites and infrasound low-frequency sounds created below the range of human hearing for eruption monitoring at Cleveland volcano.

Email Becky Oskin or follow her @beckyoskin. Follow us@OAPlanet, Facebook& Google+. Original article on LiveScience's OurAmazingPlanet.

Here is the original post:
Amazing Ash Cloud Spied from Space Station