"The reason for 3I’s rapid brightening, which far exceeds the brightening rate of most Oort cloud comets at similar distances, remains unclear."

Interstellar invader Comet 3I/ATLAS is still full of surprises — an unexpected brightening has scientists baffled

Source: space
Source Link: https://www.space.com/astronomy/comets/interstellar-invader-comet-3i-atlas-is-still-full-of-surprises-an-unexpected-brightening-has-scientists-baffled