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Almagest
(redirected from The Almagest)

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Almagest: see Ptolemy Ptolemy (Claudius Ptolemaeus), fl. 2d cent. A.D., celebrated Greco-Egyptian mathematician, astronomer, and geographer. He made his observations in Alexandria and was the last great astronomer of ancient times.
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Almagest

Astronomical and mathematical encyclopedia compiled c. AD 140 by Ptolemy. It served as the basic guide for Arab and European astronomers until the 17th century. The name derives from the Arabic for “the greatest.” Its 13 books cover such topics as the geocentric (Earth-centred), or Ptolemaic, model of the solar system; eclipses; the coordinates and sizes of certain fixed stars; and the distances to the Sun and the Moon.



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Mistaken for a star in the pre-telescopic age, Omega Centauri was labelled according to its brightness and so was given a letter by Bayer and included in his Uranometria of 1603 after it had already been catalogued by Ptolemy in the Almagest of 150AD.
The Almagest of Claudius Ptolemy was the dominant work in astronomy for over a thousand years until the publication of Copernicus's De revolutionibus in 1543.
Ptolemy, author of the Almagest, is relevant here for his Geography, a book that includes instructions on how to represent a three-dimensional world on a flat surface: a map.
 
 
 
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