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Celestial spheres
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==External links== {{Commonscat}} *[https://www.youtube.com/watch?v=_SFzDYSqR_4 Working model and complete explanation of the Eudoxus's Spheres] *Dennis Duke, [http://www.csit.fsu.edu/~dduke/ptolemy.html Animated Ptolemaic model of the nested spheres] {{Webarchive|url=https://web.archive.org/web/20060908113220/http://www.csit.fsu.edu/~dduke/ptolemy.html |date=8 September 2006 }} *Henry Mendell, Vignettes of Ancient Mathematics: [https://web.archive.org/web/20110516145329/http://www.calstatela.edu/faculty/hmendel/Ancient%20Mathematics/Eudoxus/Astronomy/EudoxusHomocentricSpheres.htm Eudoxus of Cnidus] [http://www.calstatela.edu/faculty/hmendel/Ancient%20Mathematics/VignettesAncientMath.html#Ptolemy Ptolemy, ''Almagest''] *[https://www.loc.gov/resource/rbcdrake.d036/?sp=301 M. Blundevile his exercises, p 282] β Depiction of celestial spheres in a 1613 book {{Portal bar|History|Astronomy|Stars|Outer space|Solar System}} {{Greek astronomy}} {{Good article}} {{DEFAULTSORT:Celestial Spheres}} [[Category:Ancient Greek astronomy]] [[Category:Early scientific cosmologies]] [[Category:Physical cosmology]]
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