After nearly three decades at NASA, Suni Williams has retired following three space missions that included 608 days in orbit and nine spacewalks. Her record-setting career helped bridge the era of the space shuttle to today’s commercial and deep-space missions. Credit: NASA NASA astronaut Suni Williams has retired after a 27-year career with the agency, with her retirement taking effect on Dec. 27, 2025. Over that time, Williams flew three missions to the International Space Station and built