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 Planets Is Missing One of Our Planets Is Missing "One of Our Planets Is Missing" is the third episode of the first season of the animated American science fiction television series "". It first aired in the NBC Saturday morning lineup on September 22, 1973, and was written by veteran "" director Marc Daniels. In this episode, the "Enterprise" must contend with a massive space cloud that eats planets, now targeting a Federation colony of over 82 million. On stardate 5371.3, the "Enterprise" encounters a giant cloud that consumes planets that lie in its path. They determine it is heading for Mantilles, home