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Jupiter's Great Red Spot Is a Giant, Centuries-Old Storm
The Great Red Spot on Jupiter is a persistent anticyclonic storm, larger than Earth, that has been raging for at least 350 years.
About this fact
This enormous storm system is about 1.3 times the diameter of Earth. Winds within the storm can reach speeds of up to 432 kilometers per hour (268 mph). While it has been observed for centuries, the Great Red Spot has been shrinking in recent decades, and scientists are studying why. Its reddish color is thought to be due to complex chemical reactions in Jupiter's upper atmosphere.