The third known visitor from another star system, Comet 3I/ATLAS, has been racing through the Solar System with just enough ...

Explore why the CIA issued a 'Glomar response' regarding the 3I/ATLAS interstellar object. Learn about Avi Loeb's theories on ...

Public fascination with alien visitors has surged again after a cryptic response from the Central Intelligence Agency about ...

In July, researchers using the NASA-funded Asteroid Terrestrial-impact Last Alert System survey telescope in Chile made an ...

Though this hunt came up empty, the fact that 3I/ATLAS is only the third known object found in the solar system after ...

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal interstellar body ...

One million alien visitors from another star system could already be lurking in the solar system. We aren't talking about "little green men" here, however — more "little (and not so little) gray rocks ...

The unusual behaviour of interstellar comet 3I/ATLAS has reignited online debate, but astronomers say the gaps in public ...

There may be 19 asteroids in orbit around the sun that come from somewhere else entirely. If true, we could visit an alien 'world' without ever leaving the confines of the solar system. Share on ...

Our solar system might still bear the scars from an extremely close shave with an alien star. Such an encounter – the closest pass we know of – would have shaken up objects on the outskirts and might ...