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3 International Space Station (ISS) crew members gear up for homecoming on Monday, ending their 173-day mission in space

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Aerial View of NASA. Wikimedia
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Washington, April 8, 2017: Three crew members aboard the International Space Station are packing up their gear for a homecoming on Monday, ending their 173-day mission in space, NASA said.

Expedition 50 crew members Shane Kimbrough, Sergey Ryzhikov and Andrey Borisenko will take a ride back to Earth inside the Soyuz MS-02 spacecraft.

The are scheduled to land Monday at 7:21 a.m. EDT (4.51 p.m. India time) in Kazakhstan.

“Commander Shane Kimbrough, who is returning to Earth early Monday, took it easy Friday aboard the International Space Station. He and Flight Engineers Peggy Whitson and Thomas Pesquet mainly performed light duty tasks and continued their daily exercise to stay healthy in space,” NASA scientists wrote in a blog post on Friday.

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“Cosmonauts Sergey Ryzhikov and Andrey Borisenko, who are returning home Monday with Kimbrough, continued packing the Soyuz MS-02 spacecraft that will parachute the trio to a landing in Kazakhstan after a 173 days in space,” the blog post said.

Ryzhikov, who is on his first mission, will command the Soyuz during its undocking and reentry into Earth’s atmosphere. Borisenko and Kimbrough are both wrapping up their second visit to space.

Whitson will become station commander for the second time in her career Sunday less than 24 hours before her crewmates undock from the Poisk module.

She stays behind with fellow Expedition 50-51 crew members Thomas Pesquet and Flight Engineer Oleg Novitskiy. (IANS)

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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