Claudius Ptolemy

Claudius Ptolemy was a Greek-Roman astronomer, mathematician, and geographer who lived in the 2nd century AD. He is best known for his works, particularly the "Almagest," where he presented a geocentric model of the universe, placing Earth at its center. This model dominated astronomical thought for over a thousand years. Ptolemy also wrote "Geographia," which mapped the known world and introduced concepts like latitude and longitude. His influence shaped medieval and Renaissance science and navigation, making him a central figure in the history of astronomy and geography.