Astronauts Suni Williams and Butch Wilmore’s extended stay in the International Space Station will add to what we know about how space affects health.

One moment occurred in 1984 when NASA astronaut Bruce McCandless II became the first human to spacewalk or float free from ...

The unbelievable story behind the ‘most terrifying’ image NASA has ever taken of astronaut Bruce McCandless II who did the first-ever untethered spacewalk.

From unbelievable images captured in space to predictions of asteroids colliding with Earth, we've researched a variety of ...

After spending an extended nine months aboard the International Space Station (ISS), Suni Williams and Butch Wilmore have ...

NASA astronauts Sunita Williams and Barry “Butch” Wilmore splashed down safely Tuesday in the Gulf of Mexico after an ...

Butch Wilmore and Suni Williams left the International Space Station after nine months in space, checking out with two other ...

Now that Butch Wilmore and Suni Williams are home, ending a 9-month spaceflight, questions remain about the troubled ...

While terrifying, there's an overlooked NASA spacewalk which looks equally terrifying to untrained Earth-dwellers. In 1984, ...

Having spent an incredible nine months in space, stranded astronauts Barry Wilmore and Sunita Williams were finally brought ...

Stranded NASA astronauts Sunita Williams and Butch Wilmore finally arrived home yesterday after more than nine months in ...

The astronauts remained stranded at the International Space Station — until Tuesday when they parachuted down to Earth off ...