Comet Leonard, which last passed by Earth 80,000 years ago, has been dazzling the night sky before Christmas, and there's only a few days left to see the celestial object before it disappears forever.

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Have you seen the green comets yet? Two icy visitors from ...

Two comets are going to reach their closest approach to Earth this week around the same time, and they promise to be spectacular. Comets are called C/2025 A4 (Lemmon), and C/2025 R2 (SWAN), according ...

Skywatchers of Arizona should clear their schedules. The next few weeks will feature the appearance of supermoons and meteor showers. Plus, there will also be a pair of comets visible in the night sky ...

Tracking comets accurately is hard. A new effort with the U.N. and NASA aims to better chart these visitors using 3I/ATLAS.

Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as ...