Look up Planet Nine or Planet 9 in Wiktionary, the free dictionary.
Ninth planet is a concept related to planets beyond Neptune.
Ninth planet or Planet Nine may also refer to:
Astronomy edit
- Neptune, sometimes considered the ninth planet from 1979–1999 when Pluto was classified as a planet and was temporarily closer to the Sun than Neptune
- Planet Nine, hypothetical ninth planet in the outer Solar System
- Pluto, considered the ninth planet from its 1930 discovery until it was reclassified as a dwarf planet in 2006 (except 1979–1999, see above)
Music edit
- Planet 9 (record label), founded by Mya
See also edit
- Tenth planet (disambiguation)
- Eleventh planet
- Twelfth planet (disambiguation)
- Planet X (disambiguation)
This disambiguation page lists articles associated with the title Ninth planet.
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