Geocentrism
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Geocentrism is a superseded astronomical model description of the Universe with Earth at the center. It is also known as the geocentric model, often exemplified specifically by the Ptolemaic system. U
Figure of the heavenly bodies – An illustration of a Ptolemaic geocentric system by Portuguese cosmographer and cartographer Bartolomeu Velho, 1568 (Bibliothèque Nationale, Paris)
Pages from 1550 Annotazione on Sacrobosco's De sphaera mundi, showing the Ptolemaic system.
Ptolemy
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Claudius Ptolemy, better known mononymously as Ptolemy, was a Greco-Roman mathematician, astronomer, astrologer, geographer, and music theorist who wrote about a dozen scientific treatises, three of w
Geocentrism
…geocentric model was the predominant description of the cosmos in many European ancient civilizations, such as those of Aristotle in Classical Greece and Ptolemy in Roman Egypt, as well as during the Islamic Golden Age. Two observations supported the idea that Earth was the center of the Universe. First, from…
Portrait of Ptolemy by Justus van Gent or Pedro Berruguete (1476)
Engraving of a crowned Ptolemy being guided by Urania, by Gregor Reisch (1508), from Margarita Philosophica showing an early conflation of the mathematician with the royal house of Ptolemaic Egypt, with the same last name.
Pages from the Almagest in Arabic translation showing astronomical tables.