jsc2017e136941 - At the Baikonur Museum in Baikonur, Kazakhstan, Expedition 54-55 backup crewmember Alexander Gerst of the European Space Agency signs a picture of the statue of Yuri Gagarin, the first human to fly in space Dec. 6 as his backup crewmate, S

At the Baikonur Museum in Baikonur, Kazakhstan, Expedition 54-55 backup crewmember Alexander Gerst of the European Space Agency signs a picture of the statue of Yuri Gagarin, the first human to fly in space Dec. 6 as his backup crewmate, Sergey Prokopyev of the Russian Federal Space Agency (Roscosmos) looks on. They and Jeanette Epps of NASA are serving as backups to Anton Shkaplerov of Roscosmos, Scott Tingle of NASA and Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA), who will launch Dec. 17 on the Soyuz MS-07 spacecraft for a five-month mission on the International Space Station. Andrey Shelepin/Gagarin Cosmonaut Training Center

jsc2017e136941 - At the Baikonur Museum in Baikonur, Kazakhstan, Expedition 54-55 backup crewmember Alexander Gerst of the European Space Agency signs a picture of the statue of Yuri Gagarin, the first human to fly in space Dec. 6 as his backup crewmate, S