The reins of the International Space Station were passed from Alexander Gerst of the European Space Agency to Oleg Kononenko of Roscosmos during a ceremony on the orbital outpost on Dec. 18. Gerst is returning to Earth Dec. 20 with his Expedition 57 crewmates, Serena Aunon-Chancellor of NASA and Sergey Prokopyev of Roscosmos in the Soyuz MS-09 spacecraft for a landing on the steppe of Kazakhstan to complete a six-and-a-half month mission. Kononenko remains on the station as commander of Expedition 58 along with Flight Engineers Anne McClain of NASA and David Saint-Jacques of the Canadian Space Agency.