Jupiter is the fastest spinning planet. It takes only about 10 hours to complete one rotation.
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Saturn is the second fastest spinning planet. It spins around once in only 10 hours and 34 minutes.
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Neptune rotates around its axis in about 16 hours.
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Uranus has a day length of about 17 hours.
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Earth has a day length of 23 hours and 56 minutes.
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Mars rotates around its axis in 24.6 hours.
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Mercury is very slow to rotate once. It completes one rotation in about 59 Earth days.
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Venus is the slowest spinning planet. It rotates around its axis in 243 Earth days.
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