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Ptolemy, Claudius

Claudius Ptolemy was one of the most influential Greek astronomers, geographers and mathematicians of all time, known best for his Almagest and Geography.

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Ptolemy

From About's Geography Guide, an article on Ptolemy who is estimated to have lived from approximately A.D. 90-170, and worked in the library at Alexandria from 127 to 150. Ptolemy is known for Almagest, Tetrabiblos, and his Geography.

Who was Ptolemy? Claudius (Ptolemaues) Ptolemy

Site explains that the Almagest is divided into thirteen sections, and that Ptolemy, whose geocentric system was refuted in 1543, is the name given craters on Mars and a moon.

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