Scientists are preparing for a potential cosmic revelation as interstellar comet 3I/ATLAS makes its closest pass to Earth on 19 December 2025. Since its discovery, the comet has defied many expectations with its unusual chemical makeup and behaviour, offering a rare window into planetary systems beyond our own.
Researchers believe the upcoming approach could deliver the most revealing data yet on how comets from other star systems compare with those formed around our Sun. This makes the event a critical opportunity to test and potentially revise our understanding of comet formation across the galaxy.
