Fictional planets of the Solar System a "tenth planet". Since 1992, a very large number of objects have been found beyond Neptune; all the objects in the following list, however, are purely fictional. Common names for trans-Neptunian planets in fiction include Planet X, after a planet once believed to lie beyond Neptune, and Persephone (or Proserpina), after the wife of Pluto. Rogue planets in fiction usually originate outside the Solar System, but their erratic paths lead them to within detectable range of Earth. In reality, no rogue planet has ever been detected transiting the Solar System. Fictional planets of the Solar System The fictional portrayal of
One of Our Aircraft Is Missing Submarines; a "" episode "One of Our Planets Is Missing"; the final episode of the US television series "Maverick", titled "One of Our Trains Is Missing"; the episode "One of Our Dogs is Missing" from the US television series "Lost in Space"; the episode "One of Our Assemblymen is Missing" from the US sitcom "Green Acres"; the episode "Two of Our Weirdos Are Missing" from the US sitcom "Laverne & Shirley"; the episode "One of Our Stately Homes is Missing" from the British spy-spoof cartoon series "Danger Mouse"; a 1991 text adventure game by Zenobi called "One of Our Wombats