President Donald Trump says he’s told Elon Musk to retrieve two astronauts stuck on the International Space Station for ...

Williams was accompanied by fellow astronaut, Butch Wilmore, on her ninth spacewalk. It was Wilmore's fifth spacewalk.

This story incorporates reporting from Yahoo, Space on MSN.com and MSN.NASA astronaut Suni Williams set a new record with a ...

John Mulholland, who previously managed the Boeing Starliner program before taking up the role on Boeing's space station ...

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.

Hidden within our bones, marrow sustains life by producing billions of blood cells daily, from oxygen-carrying red cells to immune-boosting white cells.

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

The taxpayer-funded news outlet NPR contradicted its own reporting Wednesday on astronauts stranded in the International ...

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

The vice president leading Boeing's Starliner spacecraft unit, Mark Nappi, has left his role in the program and been replaced ...

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