- Sidereal Rotation Periods (approx.): Earth (~23 hours 56 minutes), Mars (~24 hours 37 minutes), Mercury (~58 Earth days), Venus (~243 Earth days, retrograde). - The length of a solar day (sunrise to sunrise) can differ significantly from the sidereal day, especially for planets with slow rotation and/or significant orbital periods like Mercury and Venus. However, the question asks for the "shortest day" and among the rocky planets listed, Earth's rotation is the fastest.
Which one of the following planets has the shortest day ?
Asked in HPPSC HPAS Prelims 2017 · Topic: The Solar System (Terrestrial Planets: Mercury, Venus, Earth, Mars (Comparative Study))
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