Two weeks ago, interstellar comet 3I/ATLAS was at conjunction, on the opposite side of the Sun with respect to Earth. Last week, it reached perihelion, the closest point it would ever get to the Sun.

Comet 3I/ATLAS is just the third observed interstellar object ever witnessed in Earth's solar system. The Gemini South telescope in Chile is the latest observatory to get a glimpse of the object as it ...

3I/ATLAS is named for its status as one of three interstellar objects ever discovered in our cosmic neighborhood, as well as for the NASA-funded telescope that spotted it: ATLAS, short for Asteroid ...

Get ready to look up. A truly rare spectacle has arrived in our skies, one that stargazers and the public alike have been waiting generations to witness. Comet 3I/ATLAS is now visibly soaring past ...