The third known visitor from another star system, Comet 3I/ATLAS, has been racing through the Solar System with just enough weirdness to ignite a familiar debate: is it natural or could it be ...
Interstellar Comet 3I/ATLAS Mystery: When NASA announced the discovery of interstellar comet 3I/ATLAS on July 1, 2025, it became the third known object to enter our solar system from beyond the stars.