Scientists Spotted the Largest Comet Lying in the Solar System’s Outskirts with Outbursting Gases
Jun 21, 2025 - 14:00

NASA confirms comet C/2014 UN271, the largest known from the Oort Cloud, is chemically active. Detected by ALMA from far beyond Neptune, the comet’s carbon monoxide jets offer rare insights into icy body chemistry and early solar system conditions.