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What was ptolemy known for?

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Claudius Ptolemy: The Geography. New York: New York Public Library. Reprint, New York: Dover, 1991. (This is the only complete English translation of Ptolemy's most famous work. Unfortunately, it is marred by numerous mistakes and the placenames are given in Latinised forms, rather than in the original Greek). read more

Not much is known about the circumstances of Claudius Ptolemy’s birth or his family. It is generally believed that he was born around 100 AD in Egypt, Roman Empire. He was of Greek descent, as deduced by his Latin name, Claudius Ptolemaeus. read more

Virtually nothing is known about Ptolemy’s life except what can be inferred from his writings. His first major astronomical work, the Almagest, was completed about 150 ce and contains reports of astronomical observations that Ptolemy had made over the preceding quarter of a century. read more

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