NASA astronaut Sunita “Suni” Williams has retired from the U.S. space agency after 27 years of service, effective December 27, 2025. Her career made her one of the most respected figures in human spaceflight.

Sunita Williams, one of the most accomplished astronauts in the history of human spaceflight, has retired from the American space agency NASA after an extraordinary 27-year career.

Williams, 60, a former Navy captain, spent more than 27 years at NASA, logging 608 days in space over three station missions.