Labels:text | screenshot | font | number OCR: PTOLEMY (c. AD 90-168 ) CLAUDIUS PTOLEMAEUS, usually known simply as Ptolemy, was a Greek astronomer and mathematician who influenced astronomical thought for centuries after his death. The term "Ptolemaic universe" describes his Earth- centered view of the Universe, a view that was widely held until the 17th century. Ptolemy expanded upon the astronomical works of ancient astronomers such as Hipparchus (c. 146-c. 127 BC) in a 13-volume collection, the Almagest. SEE ALSO A-Z. NEXT
