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 ...

To travel between solar systems, a spacecraft would need extremely sophisticated – if not impossible – technology.

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 ...

Scientists search for signs of alien life on a visitor from another solar system - 3I/ATLAS is the third known interstellar ...