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Which planet has the shortest solar day?
Quick Answer
Jupiter has the shortest solar day of any planet, at about 9 hours 56 minutes. It spins so fast that one full turn takes less than 10 Earth hours.
The Full Story
Jupiter is the fastest-spinning planet in the Solar System, so its solar day is the shortest. A rotation relative to the stars, called a sidereal day, takes about 9 hours 56 minutes 30 seconds. That rapid spin helps make Jupiter noticeably flattened at the poles and bulged at the equator. It also contributes to the planet’s powerful magnetic field and dynamic bands of clouds.
Key Facts
1.Jupiter's sidereal day is about 9 h 56 m
2.Jupiter is the fastest-rotating planet
3.Its equatorial bulge is caused by rapid spin
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"The planet where a day lasts less than 10 hours!"
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