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 ...

Public fascination with alien visitors has surged again after a cryptic response from the Central Intelligence Agency about the interstellar object 3I/ATLAS. While NASA scientists have publicly ...

When the most dramatic close-up of an alien visitor remains behind the closed door, the vacuum is quickly filled. This has become the case with the comet 3I/ATLAS which is one of the rare bodies in ...

On July 1, 2025, astronomers caught sight of a mysterious object racing through the solar system. This object, now named 3I/ATLAS, became only the third known visitor from outside our planetary ...