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 comet was discovered by the Near-Earth Asteroid Tracking (NEAT) program ...

The comet broke into pieces after making a close approach around the sun in October 2025.

Even ordinary telescopes have a way of acting less ordinary when there comes a comet that will never be seen again. The ...

Comet 3I/ATLAS, only the third interstellar object ever observed, is making its final pass through our skies, offering a rare last glimpse before vanishing into deep space forever.

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 ...

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

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 ...

An 11th-century monk saw the famous "Halley's comet" first as a child and later as an adult, new research finds.