Planet X (disambiguation)

Planet X may refer to:

Astronomy

Planet X, a hypothetical planet, now disproven, proposed in 1906 by Percival Lowell to have existed beyond the planet Neptune.
- Colloquially, and by extension, any hypothetical trans-Neptunian planet, in particular Planet Nine.

Planet X, the home planet of Marvel Comics character Groot and other flora colossi
"Planet X", a 2004 X-Men comic book story-line
Planet X, a 1998 novel depicting a crossover between The X-Men and Star Trek
The Man from Planet X, a 1951 science fiction film directed by Edgar G. Ulmer
The Strange World of Planet X, a 1957 British science fiction horror novel by Rene Ray
The name for several Fictional planets of the Solar System
The name for several fictional extrasolar planets
A planet in David Ossman's 1973 sci-fi comedy album How Time Flys
The planet Daffy Duck seeks in the cartoon Duck Dodgers in the 24½th Century.

Planet X (Derek Sherinian album), 1999
Planet X (Helios Creed album), 1994
Planet-X, an album by bassist Jimmy Johnson
Live from Planet X, a 2005 live album by MF Dooms
Planet X (band), a progressive metal band founded by Derek Sherinian
Plan-It-X Records, a DIY punk rocks record label
"Welcome to Planet X (We're Coming For You)" is a KXNG Crooked song from Good vs. Evil

Nibiru, a pseudoscientific proposed outer planet within our solar system, described by Zecharia Sitchin
Nibiru cataclysm, a supposed impending disastrous encounter between Earth and a large astronomical object
Operation Planet X, a military operation during the Iraq War in 2003
Planet X Limited, a British bicycle company
Planet X Television, an action sports TV show
Packages from Planet X, an American/Canadian animated television series