Ninth planet (disambiguation)
- Ninth planet (disambiguation)
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Ninth planet may refer to:
- Pluto, widely considered the ninth planet in the Solar System from 1930 until 2006
- Neptune, the ninth-farthest planet from the Sun from 1979 to 1999 (with Pluto then considered the eighth-farthest 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-farthest planet from the Sun from 1807 to 1845
- 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)
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