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  • Planetary Day Lengths: Which Planets Have Shorter Days Than Earth?
    The two planets with a shorter day length than Earth are Jupiter and Saturn.

    * Jupiter's day is about 9 hours and 55 minutes.

    * Saturn's day is about 10 hours and 33 minutes.

    This might seem surprising since these are gas giants! They rotate much faster than Earth, which has a day length of about 24 hours.

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