Alien solar systems with multiple planets appear to be common in our galaxy, but most of them are quite different than our own, a new study finds. NASA's Kepler Space Telescope detected 1,235 alien ...

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 ...

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 ...

Yahoo Racing is powered by Motorsport Network, providing expert reporting, analysis, and insider access across the world’s top racing series. Astronomers on Tuesday (Dec. 20) announced the discovery ...

Recent research suggests that our solar system could already be hosting alien probes, potentially observing us from a distance. This idea aligns with a 2023 statement from a Pentagon UFO chief who ...

Life may not get blasted off any of the known "super-Earth" worlds as readily as it can from our planet, scientists find. The discovery suggests that any intelligent aliens that develop on such ...

Astronomers have trained telescopes on planets outside our solar system - and light years away from us. But there might be a planet from an alien solar system a bit closer to home. The mysterious ...

Astronomers have discovered an alien solar system in which six planets are orbiting a sunlike star, with five of the newfound worlds in close-knit configuration. Few stars have been observed with ...

A Harvard University astrophysicist has sparked a furious debate by warning he cannot rule out that extraterrestrials are ...

A huge object, possibly as big as Manhattan, has entered our Solar System and it might be more than just a rock. Some scientists now say it could be an alien spacecraft, with plans to attack Earth in ...