Ninth planet (disambiguation)

Last updated June 30, 2025

Look up Planet Nine or Planet 9 in Wiktionary, the free dictionary.

Ninth planet is a concept related to planets beyond Neptune.

Contents

Astronomy
Music
See also

Ninth planet or Planet Nine may also refer to:

Astronomy

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

Planet 9 (record label), founded by Mya

See also

This disambiguation page lists articles associated with the title Ninth planet.
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