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 ...

Remember 3I/ATLAS? Yes, the interstellar comet that made plenty of headlines in 2025 is still romping through our solar ...

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 ...

Solar winds near aliens’ homes – and ours – might be blowing away signs of alien technosignatures by broadening signals The SETI Institute, the nonprofit that conducts a search for extraterrestrial ...

Our solar system may not be as isolated as we once thought. According to a new study, more than 1 million interstellar objects could be lurking in the outer reaches of our cosmic neighborhood, quietly ...

Around 70,000 years ago, a small, reddish star came near our solar system and disturbed comets and asteroids – just when modern humans were beginning to leave Africa. The star – Scholz’s star – named ...

Stellar plasma can smear alien radio signals before they escape their star system, making them harder for astronomers to detect.