On Jan. 8, 2020, NASA astronaut Christina Koch became the first woman from any nation to pass the milestone of 300 days on a single spaceflight. Koch eclipsed the previous record of time in space for a woman, 289 days, on Dec. 28, 2019. NASA’s Peggy Whitson set the mark between Nov. 17, 2016 and Sept. 3, 2017.