C/2025 K1 (ATLAS) has broken into three distinct pieces following its closest approach to the sun on Oct. 8. Astronomers have ...

A stunning new image of interstellar comet 3I/ATLAS (C/2025 N1 ATLAS) reveals the cosmic visitor's ion tail has grown ...

Comet 3I/ATLAS appears to be normal and intact, despite some reports that the interstellar visitor exploded after its brush ...

November nights will bring us back to a visitor from interstellar space. If you don't know what we're talking about, you must be living under a rock at the ...

I/ATLAS has captured the attention of space enthusiasts and researchers with its unusual features. The interstellar object is expected to make another appearance soon, promising fresh insights into ...

A photographer says he feels "very lucky" to have captured Comet C/2025 A6 as it appeared over the Lancaster bomber sculpture ...

Explore NASA’s 2025 comet watchlist, which features the interstellar visitor Comet 3I/ATLAS and 8 others reshaping U.S. space research and discovery.

The widely talked about Comet 3I/ATLAS will pass by the sun on Thursday, but it will be December before stargazers can get a glimpse of the object. The first reported observations of the comet were ...

Stargazers eager to catch a rare green comet in the sky tonight, Saturday, Oct. 25, are in for a double cosmic treat as Comet Lemmon and Comet SWAN are close to Earth and visible in the sky this ...

Comet 3I/ATLAS is warming up as it approaches the sun, causing a jet to emerge. The jet is visible in a dramatic new image.

Short-period comets get close to the sun much more often than their long-period kin, and every time they do, they deplete more of their gas and dust. Consequently, they don’t typically emit as much ...

The behavior, though dramatic, is perfectly normal for comets as they heat up while approaching a star, experts say. An interstellar visitor Discovered in late June and confirmed by NASA in early July ...