Australia's space agency said there's a completely rational, albeit cosmic, explanation behind the mysterious orbs that ...

NASA’s James Webb Space Telescope has detected a carbon-rich atmosphere on a tiny world orbiting a dead, rapidly spinning ...

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

The Transporter-17 rideshare mission is scheduled to lift off at 3:10 a.m. ET on Tuesday (July 7).

The video ranks the biggest cosmic threats to humanity, from rogue planets and black holes to supernovas, gamma ray bursts, ...

Investigating an area of interesting light rock seen from orbit, Curiosity found some particularly weird-looking structures.

NASA's new alien-hunting telescope, the Habitable Worlds Observatory (HWO), will be serviceable out in space (and it will ...

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

Scientists say moons around rogue planets wandering through the galaxy could remain warm enough for life thanks to tidal heating and hydrogen-rich atmospheres. These dark, starless worlds may have had ...

Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life.

Researchers propose turning a future NASA moon base into a quarantine station that would screen space samples before they ever reach Earth.

What would summer movie season be without a Steven Spielberg blockbuster? The legendary filmmaker returns to the extraterrestrial territory he explored in “Close Encounters of the Third Kind” with ...