Astronomers analyzing observations of interstellar comet 3I/ATLAS using the W. M. Keck Observatory have discovered further ...

Named 3I/ATLAS and officially designated C/2025 N1 (ATLAS), the sudden appearance of a visitor from another star system ...

We're just weeks away from this interstellar visitor reaching its brightest in Earth's night skies. Will we see it?

Analyses of its emissions using NASA’s Neil Gehrels Swift Observatory indicate that the interstellar comet probably has a ...

This week, a series of new astronomical observations have deepened the mystery surrounding the unusual interstellar object 3I ...

Two spacecraft are on course for 3I/ATLAS, a mysterious interstellar object that some believe could be an alien mothership.

3I/ATLAS is named for its status as one of three interstellar objects ever discovered in our cosmic neighborhood, as well as ...

What makes 3I/ATLAS especially intriguing is that the comet might be three billion years older than our entire Solar System.

The spacecraft in question are NASA’s Europa Clipper, going to the eponymous icy moon of Jupiter, and the European Space ...

Observing 3I/ATLAS in this active phase will give some of the clearest insights yet into the mystery of interstellar comets.

Harvard professor Avi Loeb discusses the first new images of 3I/ATLAS after it passed Mars. Early photos from international ...