Ninth planet (disambiguation)
Appearance
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