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major planet |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.02 sec. |
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major planet [′mā·jər ′plan·ət] (astronomy) Any of the four planets that are larger than earth: Jupiter, Saturn, Neptune, and Uranus. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Scientifically and semantically, Pluto can't be a major planet and a minor planet at the same time. Voyager's visit will be the first by a spacecraft to a major planet that is almost invisible to observers on earth without the aid of a telescop. |
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