2009 Jupiter impact event

The 2009 Jupiter impact event, occasionally referred to as the Wesley impact, was a July 2009 impact event on Jupiter that caused a black spot in the planet's atmosphere. The impact area covered 190 million square kilometers, similar in area to the planet's Little Red Spot and approximately the size of the Pacific Ocean.

Source: Wikipedia — 2009 Jupiter impact event (CC BY-SA 4.0)