For only the second time ever, a collision between two asteroids has been observed around an alien star not too far beyond ...

Astronomers have been scanning the skies for alien radio signals for decades, but so far they’ve heard nary a peep (with one possible exception). But according to a recent study, that could be because ...

The interstellar comet 3I/ATLAS is making its closest approach to Earth on Dec. 19. Learn about the 'reconnaissance mission' ...

An extraordinary visitor from beyond our solar system, the interstellar comet 3I/ATLAS, is baffling scientists as it streams out carbon-rich chemical compounds at a rate rarely seen in our own cosmic ...