Editing Counter-Earth (section)

===In fiction===
{{further|Fictional planets of the Solar System#Counter-Earth}}
Counter-Earth has made appearances in fiction since the late 1800s.<ref name="StanwayCounterweightWorlds" /> It is variously depicted as very similar to Earth or very different,<ref name="VisualEncyclopediaFutureAndAlternativeHistories">{{Cite book |title=[[The Visual Encyclopedia of Science Fiction]] |date=1977 |publisher=Harmony Books |isbn=0-517-53174-7 |editor-last=Ash |editor-first=Brian |editor-link=Brian Ash (bibliographer) |pages=122 |chapter=Future and Alternative Histories |oclc=2984418 |chapter-url=https://archive.org/details/visualencycloped00ashb/page/122/mode/2up}}</ref> and often employed as a vehicle for [[satire]].<ref name="StablefordPlanet">{{Cite book |last=Stableford |first=Brian |author-link=Brian Stableford |title=[[Science Fact and Science Fiction: An Encyclopedia]] |date=2006 |publisher=Taylor & Francis |isbn=978-0-415-97460-8 |pages=374–376 |language=en |chapter=Planet |chapter-url=https://books.google.com/books?id=uefwmdROKTAC&pg=PA375}}</ref> Counter-Earth being inhabited by counterparts of the people of Earth is a recurring theme.<ref name="StanwayCounterweightWorlds" /><ref name="SFECounterEarth" /> Variations on the concept also occasionally appear, including extrasolar equivalents, the [[Mars]] equivalent "Counter-Mars", and a planet hidden on the other side of the [[Moon]] rather than [[Sun]].<ref name="StanwayCounterweightWorlds">{{Cite web |last=Stanway |first=Elizabeth |author-link=<!-- No article at present (July 2024); Stanway is an astrophysicist at the University of Warwick who has been published in [[Foundation (journal)]], among others (see https://warwick.ac.uk/fac/sci/physics/research/astro/people/stanway/sciencefiction); Wikidata Q127710708 --> |date=2023-09-24 |title=Counterweight Worlds |url=https://warwick.ac.uk/fac/sci/physics/research/astro/people/stanway/sciencefiction/cosmicstories/counterweight_worlds/ |url-status=live |archive-url=https://web.archive.org/web/20240326225747/https://warwick.ac.uk/fac/sci/physics/research/astro/people/stanway/sciencefiction/cosmicstories/counterweight_worlds/ |archive-date=2024-03-26 |access-date=2024-03-27 |website=[[Warwick University]] |series=Cosmic Stories Blog}}</ref><ref name="SFECounterEarth">{{Cite encyclopedia |year=2022 |title=Counter-Earth |encyclopedia=[[The Encyclopedia of Science Fiction]] |url=https://sf-encyclopedia.com/entry/counter-earth |access-date=2023-04-10 |edition=4th |author1-last=Langford |author1-first=David |author1-link=David Langford |editor1-last=Clute |editor1-first=John |editor1-link=John Clute |editor2-last=Langford |editor2-first=David |editor2-link=David Langford |editor3-last=Sleight |editor3-first=Graham |editor3-link=Graham Sleight}}</ref><ref name="BloomMirrorUniversesAndReversedTimeUniverses">{{Cite book |last=Bloom |first=Steven D. |title=The Physics and Astronomy of Science Fiction: Understanding Interstellar Travel, Teleportation, Time Travel, Alien Life and Other Genre Fixtures |date=2016 |publisher=McFarland |isbn=978-0-7864-7053-2 |pages=104–106 |language=en |chapter=Mirror Universes and Reversed Time Universes |chapter-url=https://books.google.com/books?id=8NbIDAAAQBAJ&pg=PA104}}</ref><ref name="GernsbackYearsScienceFictionSolarSystem">{{Cite book |last1=Bleiler |first1=Everett Franklin |title=[[Science-fiction: The Gernsback Years : a Complete Coverage of the Genre Magazines ... from 1926 Through 1936]] |last2=Bleiler |first2=Richard |date=1998 |publisher=Kent State University Press |isbn=978-0-87338-604-3 |pages=539 |language=en |chapter=The Science-Fiction Solar System |author-link1=E. F. Bleiler |author-link2=Richard Bleiler |chapter-url=https://books.google.com/books?id=PbMdeizaCNcC&pg=PA539}}</ref>