Why interstellar comet 3I/ATLAS' close Earth approach is an early Christmas gift for astronomers
December 16, 2025
Darryl Z. Seligman is an Assistant Professor of Physics and Astronomy at Michigan State University.
Comet 3I/ATLAS is the third large interstellar visitor that we have ever discovered —- an asteroid or comet that originated outside of our solar system and was discovered passing through. Astronomers can glean information about celestial bodies by observing the light reflected off them with…