NASA has postponed a planned Jan. 8 spacewalk outside the International Space Station due to a "medical concern" with an unnamed crew member.

NASA astronaut Suni Williams has retired after 27 years of service and a career defined by endurance, leadership, and firsts in space. She spent 608 days in orbit, completed nine spacewalks, and twice ...

Altogether, she accumulated 665 days in space, the most for any U.S. astronaut and eighth on the all-time space endurance list at the time of her return to Earth. Whitson retired from NASA in June ...

NASA astronaut Suni Williams, renowned for her record-setting spacewalks and leadership, retired on Dec. 27, 2025, after a ...