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The fictional portrayal of our Solar System has often included planets, moons, and other celestial objects which do not actually exist in reality. Some of these objects were, at one time, seriously considered as hypothetical planets which were either thought to have been observed, or were hypothesized in order to explain certain celestial phenomena. Often such objects continued to be used in literature long after the hypotheses upon which they were based had been abandoned. Other non-existent Solar System objects used in fiction have been proposed or hypothesized by persons with no scientific standing, while yet others are purely fictional and were never intended as serious hypotheses about the structure of the Solar System. == Vulcan == (詳細はMercury, invoked to explain certain irregularities in Mercury's orbit. The planet was proposed as a hypothesis in 1859, and abandoned not later than 1915. * "Vulcan's Workshop" (''Astounding Stories'', June 1932), short story by Harl Vincent: a penal colony is located on Vulcan.〔Uploaded to Project Gutenberg on 5 July 2009〕 * "At the Center of Gravity" (''Astounding Stories'', June 1936), short story by Ross Rocklynne: two individuals are trapped inside a hollow Vulcan.〔Republished in the 1963 anthology ''Exploring Other Worlds'' (ISBN 0-02-023110-5) and the 1973 collection ''The Men and the Mirror'' (ISBN 0-441-52460-5)〕 * Vulcan is part of the Solar System in the ''Captain Future'' series. In ''Outlaw World'' (1946) it is discovered that it is hollow and inhabited inside. * ''Mission to Mercury'' (1965), science fiction novel by Hugh Walters. During the return of the first manned flight to Mercury, a crew member notices a dark spot moving across the Sun. Since the spot is between them and the Sun and appears to be moving to the naked eye, it can only be the previously-hypothetical Vulcan; it must be moving rapidly and extremely close to the Sun. * ''The Power of the Daleks'' (1966), serial in the ''Doctor Who'' TV series. Set on an Earth colony on Vulcan in the early 21st century, a world covered with swamps. Vulcan appears to be one of Earth's first colonies, set up by 2020 AD according to publicity, but it is unclear if it is in a nearby solar system, or if Vulcan is in the Solar System. Script directions refer to 'the Plutovian night', suggesting that the story was originally set on Pluto, or that Vulcan was in a similar orbit to Pluto, at the edge of the solar system. The name "Vulcan" has been used for various other fictional planets, in and out of the Solar System, that do not correspond to the hypothetical planet Vulcan. The planet Vulcan in the Star Trek franchise, for instance, is specified as orbiting 40 Eridani A. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fictional planets of the Solar System」の詳細全文を読む スポンサード リンク
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