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てんどうせつ 天動説
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Noun
1. Ptolemaic theory; geocentric model; geocentrism​See also 地動説
Wikipedia definition
2. Geocentric model​In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system), is the superseded theory that the Earth is the center of the universe, and that all other objects orbit around it. This geocentric model served as the predominant cosmological system in many ancient civilizations such as ancient Greece.
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