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

The interstellar visitor, only the third such object to be discovered passing through our solar system, ignited controversial ...

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

When NASA’s Hubble Space Telescope captured a sharp image of the interstellar object 3I/ATLAS on July 21, 2025, it handed ...

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

Comet 3I/ATLAS was full-on erupting into space in December 2025, after its close flyby of the sun, causing it to ...

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.

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 ...

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 ...

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

NASA's SPHEREx space telescope detected organic molecules coming off comet 3I/ATLAS as the interstellar visitor made its closest approach to Earth in December.