Great-red-spot meaning

A very large, high-pressure atmospheric feature on the planet Jupiter, characterized by anticyclonic winds circulating at a speed of approximately 400 km (248 mi) per hour. The storm has persisted on Jupiter's surface for more than 300 years since first observed through telescopes; the cause of its reddish color is unknown.
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A giant anticyclonic storm on the planet Jupiter; first observed about 1665
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