NASA: Soyuz MS-25 with astronauts landed from the ISS

SCIENCE: Two Russian cosmonauts have returned to Earth after long stays on the International Space Station (ISS), but for one of them, the past 374 days are just a fraction of their total time in space. Oleg Kononenko and Nikolai Chubot, along with NASA astronaut Tracy Caldwell Dyson, lifted off aboard the Russian Soyuz MS-25 spacecraft on Monday (Sept. 23), landing in Kazakhstan at 7:59 a.m. local time (1159 GMT, 4:59 p.m. local time) ends Kononenko and Chubot’s more than year-long mission and Dyson’s 184-day stay in space aboard the International Space Station.

Overall, Dyson’s past two spaceflights were just one day shorter than Chubot’s single mission of 374 days (373 days, 20 hours, 13 minutes). But for Kononenko, the landing marked the end of his 1,111 days in space (1,110 days, 14 hours and 56 minutes), spread over five missions. Kononenko was the first person in history to spend more than 1,000 days outside Earth. The previous record was 878 days, set by cosmonaut Gennady Padalka in September 2015 over five missions.