Interstellar comet 3I/ATLAS is giving astronomers a rare, close look at material that formed far beyond our planetary ...

The theory, spearheaded by astronomer Michele Bannister and her investigative team at the University of Canterbury in New ...

Harvard astrophysicist Avi Loeb is one of the biggest proponents of the theory that the comet was sent by an alien ...

An amateur photographer in Portland captures rare images of interstellar Comet 3I/ATLAS using a smart telescope as the ...

Among these celestial visitors — the interstellar object 3I/ATLAS, along with C/2025 A6 (Lemmon) and C/2025 R2 (SWAN) — not ...

Comet 3I/ATLAS was discovered on July 1, 2025, by the NASA-funded ATLAS telescope in Rio Hurtado, Chile and was quickly confirmed to be just the third interstellar visitor to our solar system, after ...

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what you’ll need to catch a glimpse.

Researchers at Auburn University have identified a distinctive ultraviolet signature of water in the interstellar comet known as 3I/ATLAS. For millions of years, a fragment of ice and dust drifted ...

A stray comet from another star swings past Earth this week in one last hurrah before racing back toward interstellar space. Discovered over the summer, the comet known as 3I/Atlas will pass within ...

Astronomers studying the interstellar comet known as 3I/ATLAS have detected a vast and unexpected X-ray halo extending roughly 250,000 miles around the object, a finding that is challenging ...

Comet 3I/ATLAS, only the third known object from interstellar space to pass through our solar system, is about to make its closest approach to Earth. On Friday, Dec. 19, it will come within about 170 ...