Astronaut posts Earthlight selfies from ISS

CHICAGO (WLS) -- Astronaut Scott Kelly is taking some sky-high selfies, 220 miles above Earth on the International Space Station.

Light reflected from the Earth illuminates the photos he posted on Twitter.

Kelly is on a one-year mission to study the impact of weightlessness on the human body.

NASA will use the data to get ready for a potential Mars mission.
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