Saturn's atmosphere can make oval shaped clouds. They are like the clearer spots seen on Jupiter. These oval spots are cyclonic storms, similar to cyclones seen on Earth. In 1990, the Hubble Space Telescope found a very large white cloud near Saturn's equator. Storms like this one in 1990 were known as Great White Spots. These unique storms only exist for a short time and only occur in about every 30 Earth years, in summer solstices in the Northern Hemisphere. Great White Spots were also found in 1876, 1903, 1933, and 1960.
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