What Is the Length of a Day on Jupiter?


Quick Answer

The length of a day on Jupiter is 9 hours and 56 minutes. Jupiter rotates the fastest of all the planets in the solar system.

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Full Answer

Jupiter's speedy rotation accounts for its equatorial bulge, which anyone with a telescope can see clearly from Earth. The rotation also accounts for Jupiter's turbulent weather system. Jupiter is a mostly gaseous planet, with an upper atmosphere that rotates at a different rate than the lower. One result is the Great Red Spot, a more than 100-year-old storm system that's bigger than two Earths. The Great Red Spot has wind speeds many times faster than any terrestrial hurricane.

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