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Ninth planet (disambiguation) : ウィキペディア英語版 | Ninth planet (disambiguation) Ninth planet may refer to: *Pluto, considered to be the ninth planet from its discovery in 1930 until its reclassification as a dwarf planet in 2006; still considered a planet by some scientists *Neptune, the ninth-closest planet from the Sun from 1979 to 1999 (with Pluto then considered the eighth-closest planet from the Sun) *The asteroid 2 Pallas, considered to be the ninth planet in chronological discovery order from 1802 until its reclassification as a minor planet in the 1850s *Jupiter, considered the ninth-closest planet from the Sun from 1807 to 1845 as a result of the discovery of minor planets *Planet X, various hypothetical planets beyond Neptune ==See also==
*First planet (disambiguation) *Second planet (disambiguation) *Third planet (disambiguation) *Fourth planet (disambiguation) *Fifth planet (disambiguation) *Sixth planet (disambiguation) *Seventh planet (disambiguation) *Eighth planet (disambiguation) *Tenth planet (disambiguation) *Eleventh planet *Twelfth planet (disambiguation)
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ninth planet (disambiguation)」の詳細全文を読む
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