Evidence that Russia is racing to perfect a nuclear-armed spacecraft to target Western satellites is sparking the U.S. and its Allies to strengthen their space defenses.

The four astronauts in the Artemis II mission are about 148,000 miles away from Earth, traveling at a velocity of 2,737 mph as of 11:18 a.m. ET April 9. The crew is roughly 7 days and 16 hours into the 10 day mission.

A SpaceX Falcon 9 rocket launched 25 Starlink internet satellites to orbit from California on April 26. It was the company's 50th liftoff of the year already.

As humanity's first trip to the moon in over 50 years, Artemis II was a special mission that sent four astronauts farther from Earth than anyone had gone previously. This was Artemis's first crewed mission after a 2022 test flight, and future missions ...

The nanotube-based composite blocks radiation, survives extreme temperatures, and can be 3D-printed.

Astronauts and robotic spacecraft have captured breathtaking photos of Earth from space for decades. See the best images.

The four Artemis II astronauts are nearly halfway to the moon since launching Wednesday, while taking some stunning images.

The agency wants to fly it to Mars by the end of 2028. Experts say that’s … ambitious. MIT Technology Review Explains: Let our writers untangle the complex, messy world of technology to help you understand what’s coming next. You can read more from ...

On15, NASA's MESSENGER mission came to an end when the spacecraft intentionally crashed into the surface of Mercury. [‘On This Day in Space’ Video Series on Space.com] MESSENGER was the

By Karen Roman Planet Labs PBC (NYSE: PL) said it is collaborating with Carbon Mapper to design a specialized version of the Tanager spacecraft to target only shortwave infrared (SWIR) […]