Wikipedia's article on the celestial spheres, the Greek and medieval Christian cosmological model, consulted 2026-08-13.
Facts
Assessment
Reliability Tier3
Reliability tier 3: a continuously community-edited tertiary reference with no formal peer review process, suitable for citable, checkable factual claims but not treated as authoritative on genuinely contested points. NotesWikipedia's article on celestial spheres, consulted 2026-08-13. Useful here for Eudoxus's original twenty-six-sphere model, Aristotle's forty-seven-or-fifty-five-sphere physical cosmology, the Empyrean and Primum Mobile, Tycho Brahe's 1577 to 1585 comet observations, and Newton's law of universal gravitation replacing the model outright.
Citation
AuthorWikipedia contributors
PublisherWikipedia
Publication Year2026
URLhttps://en.wikipedia.org/wiki/Celestial_spheres
Source Typereference
Claims Backed By This Source (16 claims)
This source backs 16 claims across the atlas. As facts: 12 well-attested. Plus 4 entities citing it as a general reference with no single fact or relationship attached.
Disposition By Topic
- Doctrines, 8 claims: 4 well-attested, 4 general references.
- Sources, 8 claims: 8 well-attested.
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