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About: Celestial spheres     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatEarlyScientificCosmologies, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thingyago:Abstraction100002137yago:Cognition100023271yago:Content105809192yago:Cosmology106163223yago:Discipline105996646yago:HumanisticDiscipline106153846yago:KnowledgeDomain105999266yago:Metaphysics106162653yago:Philosophy106158346yago:PsychologicalFeature100023100organisationyago:WikicatEarlyScientificCosmologies New Facet based on Instances of this Class

The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus, and others. In these celestial models, the apparent motions of the fixed stars and planets are accounted for by treating them as embedded in rotating spheres made of an aetherial, transparent fifth element (quintessence), like jewels set in orbs. Since it was believed that the fixed stars did not change their positions relative to one another, it was argued that they must be on the surface of a single starry sphere.