Ptolemaic system: References & Edit History
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Additional Reading
J.L.E. Dreyer, History of the Planetary Systems from Thales to Kepler (1906), gives a clear account of the Ptolemaic system and its history. For Islamic contributions it can be supplemented by George Saliba, A History of Arabic Astronomy: Planetary Theories during the Golden Age of Islam (1994). Ptolemy set out the principle of the nested spheres in his Planetary Hypotheses (which survives only in Arabic translation); a translation of the pertinent section is given by Bernard R. Goldstein (ed.), The Arabic Version of Ptolemy’s Planetary Hypotheses (1967), vol. 57, part 4 of the Transactions of the American Philosophical Society. Albert Van Helden, Measuring the Universe: Cosmic Dimensions from Aristarchus to Halley (1985), is a history of ancient and early modern investigations of the distances of the heavenly bodies and the size of the cosmos.
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Invalidated site: The University of Texas at Austin - Ptolemy's Model of the Solar System. | Sep 28, 2026 | ||
| Add new Web site: The Galileo Project - Ptolemaic System. | Jun 26, 2026 | ||
| Add new Web site: Academia - Ptolemy's Planetary Mean Motions Revisited (PDF). | Mar 07, 2025 | ||
| Add new Web site: University of California - eScholarship - Maimonides on the Ptolemaic System: The Limits of our Knowledge (PDF). | Jan 23, 2025 | ||
| Add new Web site: The University of Chicago - Microcosmos - Notable Features of the Ptolemaic System. | Nov 28, 2024 | ||
| Add new Web site: Princeton University - Department of Mathematics - The Ptolemaic universe. | Aug 06, 2024 | ||
| Add new Web site: The University of Texas at Austin - Ptolemy's Model of the Solar System. | Jun 14, 2024 | ||
| Add new Web site: Kennesaw State University - Oglethorpe Journal of Undergraduate Research - The Ptolemaic System: A Detailed Synopsis. | Sep 05, 2023 | ||
| Add new Web site: Princeton University - Ptolemaic Astronomy in the Middle Ages. | May 08, 2023 | ||
| Changed “the Earth” to “Earth” throughout. Changed “the Earth and planets” to “Earth and the planets.” | May 19, 2020 | ||
| Added new Web site: The Catholic Encyclopedia - Systems of the Universe. | Jun 16, 2008 | ||
| Added new Web site: The Galileo Project - Ptolemaic System. | Jun 16, 2008 | ||
| Article revised. | Feb 13, 2003 | ||
| Article revised. | Oct 25, 2002 | ||
| Article added to new online database. | Jul 20, 1998 |