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After 6-Month Space Station Mission, 2 US and Russian Astronauts Return to Earth

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Sept 07, 2016: Two Russian and American astronaut returned to our planet at Kazakhstan in the wee hours of Wednesday. After completing work for 6 months on the International Space Station.

After spending 534 days in the space across four space stations American astronaut Jeff Williams became the U.S. record-holder for most time spent in orbit. Previously NASA astronaut Scott Kelly holds the record with 520 days in space. The world record is been set by  Russian Gennady Padalka who spent 879 days in space.

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Nasa quoted “Williams, along with Russian astronauts Alexy Ovchinin and Oleg Skripochka landed their Russian-made Soyuz capsule in central Kazakhstan just after 7 a.m. local time Wednesday.” About three and a half hours prior to their landing the three men disembarked from the space station.

In a statement, NASA called Williams “instrumental in preparing the station for future arrival of U.S. commercial crew spacecraft.” Nasa quoted that “Williams had performed five space walks during his time at the space station, one of which included the installation of a docking station for the commercial flights.”

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Russian Anatoly Ivanishin took command after Williams left the space station.Ivanishin remained in the space station with American Kate Rubins and Japan’s Takuya Onishi.

“Vast gratitude toward my crewmates, ground teams, supporting friends, and family.” Along with a picture of the Earth’s outer atmosphere, Williams posted on Twitter that “I would certainly miss this view!” (VOA)

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Scientists spot massive ice deposits on Mars

Recent observations by MRO's ground-penetrating Shallow Radar instrument revealed a buried ice layer that covers more ground than the state of New Mexico.

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Scientists found layers of ice on the surface of Mars. Wikimedia Commons
  • Recently, scientists have found layers of ice on the Martian land.
  • Scientists think this ice might be a useful source of water for future humans.
  • The researchers had researched 8 locations on the surface of Mars.

Scientists have unearthed thick and massive deposits of ice in some regions on Mars.

The images taken by the High-Resolution Imaging Science Experiment (HiRISE) camera aboard NASA’s Mars Reconnaissance Orbiter (MRO) showed the three-dimensional structure of massive ice deposits on Mars.

The ice sheets extend from just below the surface to a depth of 100 meters or more and appear to contain distinct layers.

It extending downward from depths as shallow as 1 to 2 meters below the surface, which could preserve a record of Mars’ past climate, the researchers noted in the journal Science.

This ice which was found can help scientists understand the climate history of Mars. IANS
This ice which was found can help scientists understand the climate history of Mars. IANS

“We expect the vertical structure of Martian ice-rich deposits to preserve a record of ice deposition and past climate,” said Colin M. Dundas, from the US Geological Survey.

“They might even be a useful source of water for future human exploration of the red planet,” Dundas added.

The researchers investigated eight locations on Mars and found thick deposits cover broad regions of the Martian mid-latitudes with a smooth mantle.

However, erosion in these regions creates scarps that expose the internal structure of the mantle.

The scarps are actively retreating because of sublimation of the exposed water ice.

The layers of ice can be used as water source by future humans on Mars, VOA
The layers of ice can be used as water source by future humans on Mars, VOA

The ice deposits likely originated as snowfall during Mars’ high-obliquity periods and have now compacted into massive, fractured, and layered ice.

Previous researchers have revealed that the Red Planet harbours subsurface water ice.

Recent observations by MRO’s ground-penetrating Shallow Radar instrument revealed a buried ice layer that covers more ground than the state of New Mexico.

NASA’s Phoenix lander had also dug up some ice near the Martian north pole in 2008, however, it is not clear if that is part of the big sheet. IANS