Harvard scientist Avi Loeb suggests comet 3I/ATLAS may be an alien vessel seeding life, after NASA's SPHEREx spacecraft detected unexplained methane and organic chemicals on board.

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

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 ...

Far out in the dark between the stars, a small visitor is carving a path through our solar system and leaving behind patterns ...

Interstellar comet 3I/ATLAS has triggered fevered speculation after the James Webb Space Telescope detected an "out of order" burst of methane in its coma, puzzling even seasoned astronomers. While a ...

Astronomers found no radio signals from the comet that would suggest it is an extraterrestrial spacecraft. 3I/ATLAS was confirmed as the third known object to enter our solar system from interstellar ...

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

January brought a wide range of thoughtful science conversations featuring researchers from the SETI Institute, spanning everything from hands-on planetary defense with citizen scientists to careful ...

In the early hours of December 19, 2025, a rare interstellar object known as 3I/ATLAS will make its closest approach to Earth. Unlike typical comets, this object originated outside our solar system ...