The interstellar comet holds more alcohol than almost all known comets in the solar system.

The newly discovered object dubbed the Great Comet of 2026 may become visible to the naked eye during its close solar pass in April.

The interstellar comet 3I/ATLAS is leaving our solar system. See new photos from a European Space Agency orbiter on its way to Jupiter.

The interstellar comet 3I/ATLAS is leaving our solar system for good. Here's what to know about its journey and NASA's ...

Learn about the latest image of comet 3I/ATLAS, captured by a European Space Agency spacecraft that's on its way to Jupiter.

Record-breaking total of 15,000+ citizen science observations from the SETI Institute & Unistellar Network — up substantially from ~10,000 in 2024. Observers are already tracking fading 3I/ATLAS, new ...

The observations revealed that the comet contains extraordinarily high levels of methanol compared with hydrogen cyanide, a pattern rarely seen in comets formed within our own Solar System.

In the fall of 2023, Unistellar observers joined forces with the Association Française d’Astronomie (AFA) to take another close look at a familiar visitor: Comet 103P/Hartley 2. This tiny but famously ...