Dec 2, 2025 · NASA missions are working together to track and study this rare, interstellar comet as it passes through our solar system. Comet 3I/ATLAS is only the third known object to pass …

3I/ATLAS was discovered on 1 July 2025 [h] by the NASA -funded ATLAS survey telescope at Río Hurtado, Chile (observatory code W68). [29][30][17] At apparent magnitude 18, the newly …

Track 3I/ATLAS in real-time with NASA data including current position, velocity, and sky coordinates.

1 day ago · Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as ever.

5 days ago · A stray comet from another star is swinging past Earth. Discovered over the summer, the comet known as 3I/Atlas will pass within 167 million miles of our planet on Friday.

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what you’ll need to catch a glimpse.

Our goal is to be the best place on the web to both understand and experience 3I/ATLAS responsibly. Scroll the tabs at left for the story, then dive into interactive tools.

4 days ago · This week marks the last chance for backyard astronomers to see interstellar Comet 3I/ATLAS before it races on its journey back to outer space

3 days ago · Comet 3I/ATLAS will approach within 168 million miles (270 million kilometers) of Earth when it makes its close flyby on Dec. 19. You can watch comet 3I/ATLAS's flyby live …

5 days ago · 3I/ATLAS Still Showing Strange Protrusion as It Approaches Earth "It is a real physical jet, with a glow extending from 3I/ATLAS towards the Sun." By Victor Tangermann …