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

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

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

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 ...

Passages of the Solar System have only been established in three interstellar objects, but the construction of new telescopes ...

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

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

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All eyes have been on the nearly 5-6 km long exocomet, including NASA’s Transiting Exoplanet Survey Satellite, aka TESS.