Third Known Interstellar Object Makes Close Pass By Earth
Third Known Interstellar Object Makes Close Pass By Earth
US · Published Dec 19, 2025
Interstellar comet 3I/ATLAS made its closest approach to Earth on December 19, providing a rare opportunity for scientific observation.
Discovered by ATLAS telescopes in Chile, 3I/ATLAS is only the third interstellar object ever observed.
The comet's flyby allows scientists to study material from another star system, offering insights into the formation and evolution of planetary systems.
Comet 3I/ATLAS made closest approach to Earth
The interstellar comet 3I/ATLAS made its closest approach to Earth early on Friday, December 19, according to NASA’s Jet Propulsion Laboratory. The flyby occurred at approximately 1 a.m. EST, with the comet reaching a distance of about 1.8 astronomical units from our planet. This close pass posed no threat to Earth but offered a unique opportunity for scientific observation.
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