The moment Austrian astrophotographer Michael Jäger unveiled his latest image of 3I/ATLAS on Nov. 28, 2025, the existing puzzle surrounding this interstellar traveller became a bona fide mystery.
In July 2025, astronomers spotted a strange object from deep space that is now flying through our solar system. Called 3I/ATLAS, it is only the third confirmed visitor from another star system, and it ...
Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.