Astronaut To Set New Record

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US astronaut Scott Kelly gestures as his space suit is tested at the Russian-leased Baikonur cosmodrome, prior to blasting off to the International Space Station (ISS), late on March 27, 2015. (AFP PHOTO / KIRILL KUDRYAVTSEV (KIRILL KUDRYAVTSEV/AFP/Getty Images)

A NASA astronaut is about to do what no other astronaut has done before.

Next week, Scott Kelly will turn over command of the international space station to a fellow astronaut and come back down to earth.

That will end 340 consecutive days in space and set a new record.

The previous record was 215 days in space, set back in 20-07 by Michael Lopez-Algeria.