National Aeronautics and Space Administration - NASA

It’s the third delay in the past month for the lunar-orbiting test flight featuring mannequins but no astronauts.

The Soyuz capsule rocketed into orbit from Kazakhstan and, just three hours later, pulled up at the space station.

American intelligence, military and political leaders make clear they see a host of strategic challenges to the U.S. in China...

There was no immediate word on when NASA might try again.

The 322-foot Space Launch System rocket was set to lift off Monday morning with three test dummies aboard on its first flight...

“I might not visually be able to see it but I know that this is going to be an experience like no other," one veteran said.

The capsule will fly around the moon in a distant orbit for a couple weeks, before heading back for a splashdown in the...

Very few people get to travel into space. Even fewer get to explore the deepest parts of the sea. But Capt. Kathryn Sullivan...

NASA and its partners hope to continue operating the 24-year-old International Space Station until 2030.

NASA is launching a study of UFOs as part of a new push toward high-risk, high-impact science.