This spring, skywatchers have been treated to the captivating and unpredictable display of a new comet, called C/2025 F2 (SWAN). Discovered in late March 2025 through data from the SWAN instrument ...

The interstellar comet 3I/ATLAS, imaged by the European Southern Observatory's Very Large Telescope on July 3, 2025.© ESO/O. Hainaut ...

Astronomers have spotted a new comet, moving on a trajectory that indicates that it whizzed into our solar system from interstellar space and is just passing through. It's only the third time ...