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Fun Fact! Jupiter has the shortest day of all planets, despite its hefty size
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With its enormous size and mass, you'd think Jupiter would rotate slowly around its axis. With a rotational velocity of 45,300 km/h, it is the fastest spinning planet in the solar system. As a result, a day on Jupiter lasts only 9 hours and 55 minutes. A year, on the other hand, is much longer; Jupiter orbits the sun once every 11.8 Earth years.