Concentric spheres
From Wikipedia, the free encyclopedia
The cosmological model of concentric or homocentric spheres, developed by Eudoxus, Callippus, and Aristotle, employed celestial spheres all of which had the same center, the Earth.[1][2] In this respect it differed from the epicyclic and eccentric models with multiple centers, which were used by Ptolemy and other mathematical astronomers until the time of Copernicus.
[edit] Notes
- ^ Neugebauer, Otto (1975), A History of Ancient Mathematical Astronomy, 2, Berlin / Heidelberg / New York: Springer-Verlag, pp. 677–85, ISBN 0-387-06995-X
- ^ Lloyd, G. E. R. (1999) [1996], "Heavenly aberrations: Aristotle the amateur astronomer", Aristotelian Explorations, Cambridge: Cambridge University Press, pp. 167–8, ISBN 0-521-55619-8
