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A planet, this is an object of the solar system whose atmosphere rotates in the direction of rotation of the planet. (Pluto-?). https://en.m.wikipedia.org/wiki/IAU_definition_of_planetA planet is an object of the solar system that has an atmosphere and axial speed. (Pluto).
Not according to the International Astronomical Union: https://en.wikipedia.org/wiki/IAU_definition_of_planet