What makes this chunk of dirty ice so magnetic is not only what it is, but where it came from. 3I/ATLAS is only the third confirmed interstellar object we've ever seen passing through our solar system ...

The third known visitor from another star system, Comet 3I/ATLAS, has been racing through the Solar System with just enough weirdness to ignite a familiar debate: is it natural or could it be ...

Those concerned that 3I/ATLAS' arrival to our solar system meant that some sort of alien invasion was imminent can breathe a sigh of relief. Echoing what NASA officials have long said, a team of ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

Did an alien spacecraft just fly by Earth? That’s the question a lot of people, including Harvard astrophysicist Avi Loeb, are asking right now. A massive interstellar object called 3I/ATLAS which ...

We already knew interstellar comet 3I/ATLAS came from somewhere far beyond our solar system. Now scientists have more ...

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

I admit it. I was utterly swept up by the 3I/Atlas mania earlier this fall. Discovered over the summer, 3I/Atlas is a rare interstellar comet. It’s only the third that humans have ever detected coming ...

Scientists confirmed that the interstellar comet 3I/ATLAS, which passed closest to Earth in December 2025, showed no detectable technosignatures strong enough to suggest it is an alien spacecraft.