There are many obstacles to overcome before humans can set foot on Mars, including problems surrounding launch mass and ...

Astronauts Butch Wilmore and Suni Williams are conducting a spacewalk outside the International Space Station to remove ...

Where the astronauts sat in the Apollo Lunar Module may have profoundly impacted the way the experience of walking on the ...

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

Astronauts on China's Tiangong station used artificial photosynthesis to turn CO₂ and water into oxygen and rocket fuel.

The founder of SpaceX said President Trump had asked his company to return two astronauts aboard the space station to Earth ...

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

NASA's two stuck astronauts are taking their first spacewalk together, exiting the International Space Station almost eight ...

Here's what we know about options SpaceX might have to bring the Starliner astronauts home faster from the space station.

While Suni Williams and Butch Wilmore’s situation is unusual, their return trip will be pretty routine, as they were already ...

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

Despite the statement from President Trump, NASA had already scheduled the astronauts' return for late March or April.