Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began...
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fiction Neptunium Neptune, the Mystic – one of the seven movements in Gustav Holst's Planets suite Timeline of the far future Stats of planets in the Solar...
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science fiction to refer to hypothetical planets beyond Neptune and Pluto (such as Planet X and even Planet Nine, theorized in 2016). Martin Nilsson (1967)...
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related to this prediction." Planets beyond Neptune Hypothetical planets of the Solar System Tyche (hypothetical planet) Nemesis (hypothetical star) As...
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up Planet Nine or Planet 9 in Wiktionary, the free dictionary. Ninth planet is a concept related to planets beyond Neptune. Ninth planet or Planet Nine...
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Trans-Neptunian object (redirect from Trans-Neptune object)
and expected orbits of Uranus and Neptune suggested that there were one or more additional planets beyond Neptune. The search for these led to the discovery...
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protostar orbited by a protoplanetary disk. There are eight planets within the Solar System; planets outside of the solar system are also known as exoplanets...
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definition of planet Planet § History Planets beyond Neptune This disambiguation page lists articles associated with the title Twelfth planet. If an internal...
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Zecharia Sitchin (redirect from Marduk (planet))
extraterrestrials from a planet beyond Neptune called Nibiru. He asserted that Sumerian mythology suggests that this hypothetical planet of Nibiru is in an...
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Tenth planet is a term formerly applied to possible planets beyond Neptune, before the reclassification of Pluto. It may also refer to: 2060 Chiron, claimed...
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Nibiru cataclysm (redirect from Planet X collision)
orbits of the planets to the extent that their effects would be easily observable today. Astronomers have hypothesized many planets beyond Neptune, and though...
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still be seen as an exhibit. Planets beyond Neptune Planet Nine Vulcan Hubbell, J. G.; Smith, R. W. (November 1992). "Neptune in America – Negotiating a...
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incorporated Uranus, Neptune, Pluto (also referred to as "outer planets") into its methodology. The outer modern planets Uranus, Neptune and Pluto are often...
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four such planets in the Solar System: Jupiter, Saturn, Uranus, and Neptune. Many extrasolar giant planets have been identified. Giant planets are sometimes...
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List of hypothetical Solar System objects (category Hypothetical planets)
asteroid belt, based on computer simulations. Various planets beyond Neptune: Planet Nine, a planet proposed to explain apparent alignments in the orbits...
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a 2001 non-fiction book by David E. Hoffman Oligarch planet, hypothetical planets beyond Neptune Old Oligarch, author of a "Constitution of the Athenians"...
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unclear causes. Orbiting bodies and rotation: Are there any non-dwarf planets beyond Neptune? Why do extreme trans-Neptunian objects have elongated orbits? The...
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Solar System (redirect from Outer planets)
Saturn); and two ice giants (Uranus and Neptune). All terrestrial planets have solid surfaces. Inversely, all giant planets do not have a definite surface, as...
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a popular one in fiction. Disrupted planet Hypothetical planetary object Planet § History Planets beyond Neptune Trans-Neptunian object Trans-Neptunian...
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trans-Neptunian objects Extreme trans-Neptunian object Planets beyond Neptune 60 minor planets with a semi-major axis greater than 150 AU and perihelion...
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Fictional planets of the Solar System have been depicted since the 1700s—often but not always corresponding to hypothetical planets that have at one point...
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asteroid Fictional planets of the Solar System Hypothetical moon of Mercury Nemesis (hypothetical star) Planet Nine Planets beyond Neptune John H. Tice, weather...
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Heliocentrism – Historical models of the Solar System Planets beyond Neptune List of former planets List of hypothetical Solar System objects in astronomy...
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has eight planets by the most restrictive definition of the term: the terrestrial planets Mercury, Venus, Earth, and Mars, and the giant planets Jupiter...
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The planet Neptune has 16 known moons, which are named for minor water deities and a water creature in Greek mythology. By far the largest of them is Triton...
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Moon) or one of the modern planets. The symbols were also used in alchemy to represent the metals associated with the planets, and in calendars for their...
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Kelvin–Helmholtz heating Nemesis (hypothetical star) Planet Nine Planets beyond Neptune Vulcan (hypothetical planet) A cold hydrogen-rich gas giant slightly more...
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Around a Loaded Sputnik Planitia Basin, Pluto". Journal of Geophysical Research: Planets. 126. Bibcode:2021JGRE..12606964M. doi:10.1029/2021JE006964....
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agree that Planet X, as Lowell defined it, does not exist, as of January 2016 there is speculation concerning Planet Nine. Planets beyond Neptune Obituary...
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formed via co-accretion, similar to the process believed to have formed the planets in the Solar System. As the young gas giants formed, they were surrounded...
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