Interstellar invader Comet 3I/ATLAS is still full of surprises — an unexpected brightening has scientists baffled "The reason for 3I’s rapid brightening, which far exceeds the brightening rate of most Oort cloud comets at similar distances, remains unclear." Astrobitica October 31, 2025 (Last updated: October 31, 2025) 1 minute read “The reason for 3I’s rapid brightening, which far exceeds the brightening rate of most Oort cloud comets at similar distances, remains unclear.” About the Author Astrobitica Administrator Visit Website View All Posts Post navigation Previous: Kyivstar prepares to expand Starlink Direct to Cell testing across UkraineNext: Shenzhou-21 completes rapid docking with Tiangong space station 3.5 hours after launch