Scientists have found new evidence suggesting that interstellar 3I/ATLAS is not an alien spaceship, as one conspiracy theory claims, but a comet.

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.

The idea that a mysterious object streaking through the Solar System might be an alien craft is irresistible, and 3I/ATLAS has become the latest canvas for that fantasy. But when the speculation ...

On July 1, humanity became aware of comet 3I/ATLAS. This is only the third interstellar object known to us, even though, statistically, many thousands are flying through the Solar System as we speak; ...

A team of astronomers found no radio signals from the comet that would suggest it is an extraterrestrial spaceship. The comet was confirmed in July 2025 as the third known object to enter our solar ...