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  2. Artificial planet - Wikipedia

    en.wikipedia.org/wiki/Artificial_planet

    An artificial planet [1] (also known as a planetary replica or a replica planet) [2] is a proposed stellar megastructure. Its defining characteristic is that it has sufficient mass to generate its own gravity field that is strong enough to prevent atmosphere from escaping , [ 3 ] [ 4 ] although the term has been sometimes used to describe other ...

  3. Fictional planets of the Solar System - Wikipedia

    en.wikipedia.org/wiki/Fictional_planets_of_the...

    Science fiction bibliographers E. F. Bleiler and Richard Bleiler, in the 1998 reference work Science-Fiction: The Gernsback Years, list various imaginary constituents of the pre-modern "science-fiction Solar System". Among these are planets between Venus and Earth, planets on the inside of a hollow Earth, and a planet "behind the Earth". [16]

  4. List of hypothetical Solar System objects - Wikipedia

    en.wikipedia.org/wiki/List_of_hypothetical_Solar...

    Counter-Earth, a planet situated on the other side of the Sun from that of the Earth. Fifth planet (hypothetical), historical speculation about a planet between the orbits of Mars and Jupiter. Phaeton, a planet situated between the orbits of Mars and Jupiter whose destruction supposedly led to the formation of the asteroid belt. This hypothesis ...

  5. List of fictional countries set on Earth - Wikipedia

    en.wikipedia.org/wiki/List_of_fictional...

    This is a list of fictional countries from published works of fiction (books, films, television series, games, etc.). Fictional works describe all the countries in the following list as located somewhere on the surface of the Earth as opposed to underground, inside the planet, on another world, or during a different "age" of the planet with a different physical geography.

  6. Extrasolar planets in fiction - Wikipedia

    en.wikipedia.org/wiki/Extrasolar_planets_in_fiction

    Planets themselves being portrayed as alive, while relatively rare (especially compared to stars receiving the same treatment), is a recurring theme. [1] [38] Sentient planets appear in Ray Bradbury's 1951 short story "Here There Be Tygers", Stanisław Lem's 1961 novel Solaris, and Terry Pratchett's 1976 novel The Dark Side of the Sun.

  7. Dyson sphere - Wikipedia

    en.wikipedia.org/wiki/Dyson_sphere

    Inspired by the 1937 science fiction novel Star Maker by Olaf Stapledon, [4] the physicist and mathematician Freeman Dyson was the first to formalize the concept of what became known as the "Dyson sphere" in his 1960 Science paper "Search for Artificial Stellar Sources of Infra-Red Radiation".

  8. Theia (planet) - Wikipedia

    en.wikipedia.org/wiki/Theia_(planet)

    Theia (/ ˈ θ iː ə /) is a hypothesized ancient planet in the early Solar System which, according to the giant-impact hypothesis, collided with the early Earth around 4.5 billion years ago, with some of the resulting ejected debris coalescing to form the Moon.

  9. Category:Fictional planets - Wikipedia

    en.wikipedia.org/wiki/Category:Fictional_planets

    Pages in category "Fictional planets" The following 50 pages are in this category, out of 50 total. This list may not reflect recent changes. ...