Three astronauts returned to Earth from the International Space Station Friday evening (Sept. 11), taking the orbiting lab's population back down to its normal level of six crewmembers.
A Russian Soyuz spacecraft carrying cosmonaut Gennady Padalka, European Space Agency astronaut Andreas Mogensen and Kazakhstan's Aidyn Aimbetov touched down safely on the Kazakh steppes at 8:51 p.m. EDT on Friday (0051 GMT Saturday), 3.5 hours after departing the space station.
The landing marked the end of a quick mission for Mogensen and Aimbetov, who had arrived at the $100 billion orbiting complex just last Friday (Sept. 4). Padalka, on the other hand, had been aboard for the usual 6-month stint.
Padalka came up in March with fellow cosmonaut Mikhail Kornienko and NASA's Scott Kelly, both of whom are now halfway through an unprecedented yearlong orbital mission. Researchers are studying how Kornienko and Kelly adapt physiologically and psychologically to long-duration spaceflight, in an attempt to pave the way for crewed journeys to Mars and other distant destinations.
The 12-month mission necessitated the temporarily crowded conditions on the space station. Soyuz capsules are certified to remain in space for just 6 months, so the vehicle that brought Padalka, Kornienko and Kelly up cannot be used to take the latter two down next March. Mogensen and Aimbetov therefore launched to the orbiting lab — along with cosmonaut Sergey Volkov, who is staying aboard until next March — primarily to provide Kornienko and Kelly with a vehicle that will take them home.
Incidentally, Aimbetov was not originally scheduled to go to space this month. His spot on the brief mission was supposed to be filled by English singer Sarah Brightman, who was reportedly prepared to pay about $50 million for her orbital experience. But Brightman backed out in May, citing personal reasons.
The people still aboard the International Space Station in addition to Kornienko, Kelly and Volkov are NASA astronaut Kjell Lindgren, Japan's Kimiya Yui and cosmonaut Oleg Kononenko.
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Michael Wall is a Senior Space Writer with Space.com and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.