Koch’s stay on the ISS began on March 14, 2019 and continued through Expeditions 59, 60, and 61. During her stay on the station, she and fellow astronaut Jessica Meir completed the first ever all-female spacewalk. She then broke the record for longest continuous stay in space by a woman on December 28. The previous record was held by astronaut Peggy Whitson.
Koch’s time on the ISS will provide valuable data for NASA abot the long-term physical and mental of effects of space- travel on humans.