US astronaut sets record for longest spaceflight by a woman

US astronaut sets record for longest spaceflight by a womanKoch is expected to spend a total of 328 days, or nearly 11 months, on board the space station before returning to Earth. Missions are typically six months, but NASA announced in April that it was extending her mission until February. The U.S. record for longest space flight is 340 days set by Scott Kelly in 2015-2016.