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    •  Science >> Science Discoveries >  >> Astronomy
    Mars: The Inner Planet with the Longest Orbital Period - Explained
    The inner planet that takes the longest to orbit the Sun is Mars.

    Here's why:

    * Kepler's Laws of Planetary Motion: The further a planet is from the Sun, the longer its orbital path and the slower its orbital speed.

    * Orbital Periods:

    * Mercury: 88 Earth days

    * Venus: 225 Earth days

    * Earth: 365.25 Earth days

    * Mars: 687 Earth days

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