Comet 3I/ATLAS is already racing back into deep space, but its surprise resurgence in December 2025 has turned a fading curiosity into a case that planetary scientists will be arguing over for years.

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the ...

Comet 3I/ATLAS was full-on erupting into space in December 2025, after its close flyby of the sun, causing it to significantly brighten. Even water ice was quickly sublimating into gas in ...

Interstellar comets are the original cosmic explorers, and by studying their metallic whispers, we are learning the secrets ...

NASA's infrared telescope SPHEREx captured stunning images of interstellar comet 3I/ATLAS as it exited the solar system.

The latest data from the Webb telescope (reported here) indicates that the plume of gas and dust surrounding 3I/ATLAS ...

Scientists found new evidence (or lack thereof) disproving the conspiracy theory that interstellar comet 3I/ATLAS is alien ...

Is 3I/ATLAS just a comet — or an intergalactic ark? A NASA spacecraft has discovered organic chemicals on 3I/ATLAS, which ...

In December 2025, NASA's SPHEREx space telescope captured stunning infrared images of comet 3I/ATLAS as it dramatically brightened during its farewell tour of the solar system. This remarkable event, ...

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.

Comets usually fade quietly once they swing past the Sun. Interstellar comet 3I/ATLAS did not follow the same path. Instead, ...

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 ...