An interstellar comet that passed through the Solar System last year may be up to 12 billion years old – far older than the ...

The interstellar comet emitted methane, a potential biosignature, as it passed the sun, physicist Avi Loeb says.

A Stanford scientist's model suggests many small rocky planets can't sustain atmospheres, potentially explaining the scarcity ...

A strange interstellar comet discovered last year and speculated by a prominent astronomer to be an alien spacecraft could be ...

A leading astrobiologist argues that advanced aliens may well exist but are likely giving Earth a miss, thanks to vast ...

Salt Clouds on GJ 504b reveal exotic atmospheric chemistry as JWST uncovers a surprising new mystery around the Pink Planet.

Every second, hypervelocity collisions may be blasting tiny flecks of Earth into space. Some of those grains, small enough to ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming into view, revealing hints of a surprising past – and the origin of Saturn's ...

Discover the latest sightings, and theories about aliens & UFOs. From news about extraterrestrial life, cover-ups, and ...

Ryan Gosling’s newest costar is high-maintenance, had an entourage around him at all times and required his own wardrobe department on set. He’s also a space alien. “He is in the hotel right now in ...

A visitor from another star system is creating excitement in the astronomy community. The comet 3I/ATLAS which was first spotted in July 2025 contains chemical clues that scientists can use to study ...