Vocabulary Entry

ptolemy

|noun

noun

A Greek astronomer, mathematician, and geographer who lived in the 2nd century AD, known for his work in astronomy and the development of the geocentric model of the universe.

Example Sentences

"Ptolemy's geocentric model was widely accepted until the Copernican revolution."

"The Almagest by Ptolemy laid the groundwork for future astronomical studies."

"Historians often cite Ptolemy as a pivotal figure in ancient science."