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date: 30 September 2023

Ptolemy, 

Source:
The Oxford Dictionary of Byzantium
Author(s):
David PingreeDavid Pingree, Anthony CutlerAnthony Cutler

ancient astronomer, astrologer, and mathematician; fl. Alexandria ca.130–75.The greatest authority on astronomy and astrology in late antiquity, Ptolemy continued to be regarded as such in Byz. until the Palaiologan period, when some astronomers, beginning with ... ...

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