In February 1995, a small research organization known as the SETI Institute launched what was then the most comprehensive ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Astronomers identified a potentially hazardous asteroid traveling 38,700 mph, measuring between 130 and 300 feet wide, and a ...

On 27 December last year, astronomers using the ATLAS survey telescope in Chile discovered a small asteroid moving away from ...

Mars haunts us as a vision of a planet gone wrong. It was once warm and wet, with rivers flowing across its surface and ...

A grainy snippet of video footage taken in the dark of night, seemingly by an airport CCTV camera, appears to show the fatal ...

"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

First spotted last month by a telescope in Chile, the near-Earth asteroid — designated 2024 YR4 — is estimated to be 130 to ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

CAPE CANAVERAL, Fla. (AP) — NASA’s two stuck astronauts took their first spacewalk together Thursday, exiting the ...

NASA’s commercial partners defended the Artemis moon mission plans Wednesday amid the specter of changes from the new Trump administration.

National Geographic premiered "SALLY," Cristina Costantini's new documentary about the first U.S. woman in space and her ...