It was an unexpected finish to a mission that began in August and left the International Space Station with only three on ...

NASA completed its first medical evacuation early Thursday, when an ailing astronaut and three others splashed down in the ...

The companion star of Betelgeuse, seen for the first time by the Gemini North Telescope. "This discovery answers the ...

"Suni Williams has been a trailblazer in human spaceflight, shaping the future of exploration through her leadership aboard ...

Williams and another astronaut, Butch Wilmore, were supposed to stay in space for a week in 2024, but concerns about the ...

NASA astronaut Suni Williams has retired. Williams, along with the now-retired Butch Wilmore, rode on the Boeing Starliner to ...

Astronomers have confirmed the earliest barred spiral galaxy in the universe, a Milky-Way-like structure that existed just 2 ...

High above Earth, Sunita Williams did something deeply human. She searched for home. The veteran Nasa astronaut said that ...

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 ...

University of Chicago astronomy and astrophysics professor Donald G. York​, who is credited with pioneering contributions to ...

Buzz Aldrin, the second man and only one of 12 to ever walk on the moon, turns 96 today. He's just one of four living ...