https://en.wikipedia.org/wiki/Comet_Shoemaker–Levy_9 https://en.wikipedia.org/wiki/Comet_Shoemaker–Levy_9 An entire fragmented comet impacted Jupiter in 1994

https://en.wikipedia.org/wiki/Comet_Shoemaker–Levy_9 https://en.wikipedia.org/wiki/Comet_Shoemaker–Levy_9 An entire fragmented comet impacted Jupiter in 1994 > Over the next six days, 21 distinct impacts were observed, with the largest coming on July 18 at 07:33 UTC when fragment G struck Jupiter. This impact created a giant dark spot over 12,000 km (7,500 mi) across, and was estimated to have released an energy equivalent to 6,000,000 megatons of TNT (600 times the world's nuclear arsenal).[24] Two impacts 12 hours apart on July 19 created impact marks of similar size to that caused by fragment G, and impacts continued until July 22, when fragment W struck the planet.[25]