Almagest
Sign in to savepage=309|thumb|An edition in Latin of the Almagestum in 1515 The Almagest ( ) is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy ( ) in Koine Greek. One of the most influential scientific texts in history, it canonized a geocentric model of the Universe that was accepted for more than 1,200 years from its origin in Hellenistic Alexandria, in the medieval Byzantine and Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus. It is also a key source of informati
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The Almagest is a 2nd-century mathematical and astronomical treatise written by Claudius Ptolemy that explained the motions of stars and planets using a model in which Earth is at the center of the Universe. This work became one of the most influential scientific texts in history, shaping astronomy and cosmology for over 1,200 years across multiple civilizations until the Copernican revolution challenged its geocentric model.
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Book · Open Library
- Author
- Ptolemy
- First published
- 1948
- Editions
- 13
- Subjects
- Addresses, essays, lectures, Astronomy, Early works to 1800, Greek Mathematics, Astronomy, early works to 1800, Stars, Catalogs
via Open Library
Article
23 sectionsContents
- Names
- History
- Contents
- The ''Syntaxis Mathematica'' books
- Ptolemy's cosmos
- The star catalogue
- Errors in the coordinates
- Constellations in the star catalogue
- Ptolemy's planetary model
- Influence
- Modern assessment
- Modern editions
- Gallery
- See also
- References
- Notes
- Citations
- Sources
- Books
- Journals and magazines
- Websites
- Further reading
- External links
page=309|thumb|An edition in Latin of the Almagestum in 1515 The Almagest ( ) is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy ( ) in Koine Greek. One of the most influential scientific texts in history, it canonized a geocentric model of the Universe that was accepted for more than 1,200 years from its origin in Hellenistic Alexandria, in the medieval Byzantine and Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus. It is also a key source of information about ancient Greek astronomy.
Ptolemy set up a public inscription at Canopus, Egypt, in 147 or 148. Norman T. Hamilton found that the version of Ptolemy's models set out in the Canopic Inscription was earlier than the version in the Almagest. Hence the Almagest could not have been completed before about 150, a quarter-century after Ptolemy began observing.