Scientists are sharpening the methods used to search for alien artifacts inside our own solar system, drawing on recent peer-reviewed studies published in The Publications of the Astronomy Society of ...

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 ...