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    sathishvanij's Avatar
    sathishvanij Posts: 1, Reputation: 1
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    #1

    Apr 26, 2012, 07:38 AM
    How do u define a planet
    How do u define a planet
    RickJ's Avatar
    RickJ Posts: 7,762, Reputation: 864
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    #2

    Apr 26, 2012, 07:44 AM
    The definition has varied over the years.

    In 2006, the International Astronomical Union issued their updated definition of a "planet":

    "A planet is a body that orbits the Sun, is massive enough for its own gravity to make it round, and has "cleared its neighbourhood" of smaller objects around its orbit."

    Source.

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