NASA still is not sure when two astronauts might come home in Boeing's new Starliner spacecraft.

NASA is facing a tight budget and wants to wrap up the Chandra X-ray Observatory, but astronomers don't want to see the 25-year-old X-ray space telescope mission go.

A SpaceX rocket has failed for the first time in nearly a decade, leaving the company’s internet satellites in an orbit so low that they're doomed to fall through the atmosphere and burn up.

The galaxies' fanciful names belie their actual ages: In this case of the Penguin and the Egg, it’s the Egg that came first.

A report from Nature shows that astronomers may have found a medium-sized black hole, a kind they've long looked for.

The four crew members entered the 3D-printed Mars replica on June 25, 2023, as part of a NASA experiment to observe how humans would fare living on the Red Planet.

The return of Starliner has been indefinitely delayed, but NASA and Boeing say the astronauts will use the spaceship to get home — eventually.

Problems with the capsule's propulsion system, used to maneuver the spacecraft, prompted NASA and Boeing to delay the flight home several times while they analyzed the trouble.

The far side of the moon looks very different from the near side, and with the Chang'e 6 mission, scientists are hoping to learn why.

Space Camp is a new series about all the weird, wonderful things happening in the universe by NPR's science podcast Short Wave. Check out the rest of the series.

The space agency determined that the material was a metal alloy stanchion used on “NASA flight support equipment.”

NASA and other federal agencies recently did a tabletop simulation of an Earth-threatening asteroid to see how they'd handle it

A NASA simulation accidentally aired on the space agency's livestream. NASA said all crew members are healthy, safe and preparing for a spacewalk scheduled for Thursday.

We kickoff our series Space Camp with a look at space launches. What does hurtling into space feel like? What physics are involved? And what's the "junk" in Earth's orbit?

This is the fourth test for Starship, and this time, it returned successfully to earth.