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inner planet |
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inner planet [¦in·ər ′plan·ət]
(astronomy) Any of the four planets (Mercury, Venus, Earth, and Mars) in the solar system whose orbits are closest to the sun. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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