Interstellar comet 3I/ATLAS glows green; here's how to spot it

Technology Dec 14, 2025

Heads up, space fans! The interstellar comet 3I/ATLAS, discovered in July 2025, is lighting up the night sky with a cool green glow—thanks to sun-heated carbon.
After swinging close to the Sun at the end of October, it's now 10 times brighter and making quite an entrance.

How to catch a glimpse

You can spot 3I/ATLAS almost anywhere on Earth—just grab some binoculars or a telescope and look for it in the constellation Virgo.
It'll be closest to us on December 19 (about 170 million miles away), so that's your best shot.
Want help tracking it? Apps like Stellarium make finding its path easy before it becomes too close to the Sun to observe.