Expedition 57 crew members Serena Aunon-Chancellor of NASA, left, and Sergey Prokopyev of Roscosmos pose for a photo aboard the International Space Station June 23, 2018 in Earth Orbit.

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Photo credit: © NASA Photo / Alamy / Afripics
License: Licensed
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Keywords: 57, american, astronaut, aunon-chancellor, cosmonaut, expedition, horizontal, indoors, international, microgravity, nasa, orbit, pose, prokopyev, russian, serena, sergey, smiling, space, station, weightlessness