NASA International Space Station Expedition 54-55 backup crew member Russian cosmonaut Sergey Prokopyev of Roscosmos (middle) signs in for the crews final qualification exam at the Gagarin Cosmonaut Training Center November 28, 2017 in Star City, Russia. (photo by Elizabeth Weissinger via Planetpix)

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NASA International Space Station Expedition 54-55 backup crew member Russian cosmonaut Sergey Prokopyev of Roscosmos (middle) signs in for the crews final qualification exam at the Gagarin Cosmonaut Training Center November 28, 2017 in Star City, Russia.

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Size: 5150px × 3428px
Location: Star City, Russia
Photo credit: © NASA Photo / Alamy / Afripics
License: Licensed
Model Released: No

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