"Alien Worlds" entry Most extrasolar planets in fiction are similar to Earth—referred to in the Star Trek franchise as Class M planets—and serve only as settings...

in religion, astrology, ufology and pseudoscience For lists of planets in fiction, see: Fictional planets of the Solar System, Extrasolar planets in fiction...

An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not then...

Earth". A rogue planet colliding with Earth is a recurring motif in apocalyptic fiction. Extrasolar planets in fiction Sun in fiction List of hypothetical...

in itself that dust and debris may be orbiting the stars. Examples of planets, or their related remnants, considered to have been a disrupted planet,...

2/(25+√621)) are "planets" (no matter how they formed). The minimum mass/size required for an extrasolar object to be considered a planet should be the same...

proposed in religion, astrology, ufology and pseudoscience and Stars proposed in religion For hypothetical planets in fiction, see: Fictional planets of the...

quickly via hydrodynamic escape than larger planets and planets farther out. A gas dwarf could be defined as a planet with a rocky core that has accumulated...

two additional planets: an inner Earth-mass planet orbiting every 3.8 days and an outer Neptune-mass planet orbiting every 90 days. In August 2018, Ment...

clouds can show the dynamical influence of extrasolar planets, and potentially indicate the presence of these planets. Because it is often located near a star's...