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 ...

Scientists say the colour shift in interstellar comet 3I/ATLAS is due to gases in the comet's coma reacting to solar heat.

The vast, seemingly empty gulf of space occasionally tosses us a gift — a visitor from beyond the confines of our own Solar System, a true cosmic stranger. These interstellar travellers are the rarest ...

Forget aliens lurking in the shadows of some distant planet; astronomers are transfixed by one that's just blazed into our solar system from the cosmic void. This comet is an object so profoundly rare ...