Interstellar object

3I/ATLAS

3I/ATLAS is a comet from another star, on its way out of the Solar System.

The third object seen passing through the Solar System from another star, reported by the ATLAS survey in Chile on 1 July 2025. It came closest to the Sun, about 1.4 au, at the end of that October.

Key facts

Catalogue

C/2025 N1 (ATLAS)

Closest to the Sun

1.35 au

How the map draws it

Drawn as a generic comet — the kind of thing, not this exact one · its nucleus is hidden in its cloud and nobody has seen it; the tails are part of the drawing, not an observation.