Interstellar comet 3I/ATLAS is now barreling away from the sun, never to return to the solar system. There's one more chance ...

I just received this image of Comet 240P/NEAT from longtime Astronomy contributor Chris Schur, and I had to share it. This ...

The interstellar visitor may still have a few things to tell us before it leaves our solar system.

C/2024 E1 (Wierzchos) brightened significantly ahead of its close approach to the sun.

Stargazers are in for a once-in-many-lifetimes opportunity this week as a comet will be visible passing by Earth for the last time for over a millennium. Comet C/2025 A6—also known as “Comet Lemmon”— ...

3I/ATLAS is the third interstellar visitor ever to visit the solar system having been formed around a distant star. Tune in ...

Comet 3I/ATLAS, only the third interstellar object ever observed, is making its final pass through our skies, offering a rare ...

Comet C/2025 A6 Lemmon on Oct. 11, 2025, as imaged by Gianluca Masi at The Virtual Telescope Project (www.virtualtelescope.eu). The Northern Hemisphere’s night skies this October are building toward ...

New polarimetry data on interstellar comet 3I/ATLAS reveals bizarre refractory dust, proving this alien visitor formed in a ...

Comet Lemmon, a comet discovered in January, may be visible with the unaided eye after sunset this week. Credit: Creators.com illustration It’s been a few years since we’ve seen a decently bright ...

King William should have seen his demise coming, according to the medieval omen experts of his era. Halley’s comet appeared ...