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  1. Oxford American Dictionary

    rogue planet

    • n.
      a celestial object that is the size of a planet but does not orbit a star

    • noun: rogue planet, plural noun: rogue planets

    • 釋義

    名詞

    • 1. a celestial object that is the size of a planet but does not orbit a star there may be billions of rogue planets, not bound to any star