During a five-and-a-half hour spacewalk with her colleague Butch Wilmore, Sunita Williams surpassed former astronaut Peggy ...

Elon Musk and SpaceX will handle the return of astronauts Sunita Williams and Butch Wilmore from the ISS after delays.

Plus: Bringing astronauts back from the ISS, fixing hearts with space-grown cells, why your kids need to touch grass and more ...

Williams, who was on her ninth spacewalk, now ranks fourth worldwide for longest accumulative spacewalking time.

The four American astronauts aboard the ISS, including the Boeing Starliner crew, spoke to USA TODAY in an exclusive interview Tuesday.

NASA astronauts Suni Williams and Butch Wilmore completed a spacewalk Thursday while awaiting their delayed return to Earth.

NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore have been on the International Space Station since June, ...

NASA's two stranded astronauts conducted their first spacewalk together Thursday, stepping outside the International Space Station.

The robotic arm delivered NASA astronaut Suni Williams to a worksite during a record-breaking spacewalk at the International ...

Starliner co-pilot Sunita Williams is now the world's most experienced female spacewalker, moving up to number four overall.