NASA greenlit Monday’s spacewalk just three days ago – a stark contrast to how most Extravehicular Activities (EVAs) are planned months in advance.
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It stalled while it was moving around the outside of the station, and experts believe it could be due to a stuck brake handle.
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Two American astronauts will take a short, but unplanned, spacewalk today (Dec. 21) to fix a stuck railcar on the International Space Station in time for the arrival of a new cargo ship later this week.
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NASA says the fix is a “cautionary measure” that needs to be done before a Russian supply ship arrives on Wednesday.
The problem involves the space station’s robotic arm, which moves from place to place along the station’s central truss aboard a sort of miniature rail auto.
NASA astronaut Scott Kelly is seen during his first spacewalk outside the International Space Station on October 28, 2015.
With their primary objective completed well ahead of schedule, the spacewalkers proceeded to route a series of cables that will support a docking port for future commercial crew capsules and retrieved tools for future use.
If the brake was somehow inadvertently engaged, it may be an easy task to unstick it. The astronauts may then turn to a few other get-ahead tasks as part of their ongoing maintenance and upgrades of the ISS.
It was the seventh spacewalk of the year.
The spacewalk will be Kelly’s third since he began a yearlong mission in March, and the second of Kopra’s career.
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The Russian supply spacecraft is scheduled to be launched from the Baikonur Cosmodrome in Kazakhstan on Monday.
