Oct 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 the third known object from outside …

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.

2 days ago · "The reason for 3I’s rapid brightening, which far exceeds the brightening rate of most Oort cloud comets at similar distances, remains unclear." The interstellar invader Comet …

3I/ATLAS, also known as C/2025 N1 (ATLAS) and previously as A11pl3Z, is an interstellar comet [16][17] discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station.

See the live position and real-time trajectory of interstellar comet 3I/ATLAS (C/2025 N1). Our interactive tracker uses the latest NASA/JPL ephemeris data for the most accurate simulation.

4 days ago · Track 3I/ATLAS, the newly discovered interstellar object flying by Earth in 2025. Real-time countdown, news updates, educational resources, and astronomical insights.