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- Ptolemy | Accomplishments, Biography, Facts | Britannica
Ptolemy was an astronomer, mathematician, and geographer who lived during the 2nd century CE He is known for his geocentric (Earth-centred) model of the universe
- Ptolemy I Soter - Wikipedia
Ptolemy was king and pharaoh of Ptolemaic Egypt from 305 304 BC to his death in 282 BC, [note 1][3] and his descendants continued to rule Egypt until 30 BC During their rule, Egypt became a thriving bastion of Hellenistic civilization and Alexandria a great seat of Greek culture
- Claudius Ptolemy - World History Encyclopedia
Ptolemy was a keen astronomer, although he was reliant on the naked eye since the telescope was not invented until the early 17th century What Ptolemy did have access to were masses of astronomical observations taken by ancient Babylonian scientists from the 8th to the 3rd centuries BCE
- Claudius Ptolemy - Biography, Facts and Pictures
Claudius Ptolemy wrote the Almagest, the work that defined astronomy for over 1,000 years The Almagest included a catalogue of over a thousand stars, recording their positions, constellations, and relative brightnesses; and a mathematical model predicting the movements of the planets
- 10 Facts About Ptolemy - Have Fun With History
Ptolemy, whose full name was Claudius Ptolemaeus, was a prominent ancient Greek scholar who lived during the 2nd century AD He made significant contributions to various fields, including astronomy, geography, and mathematics
- Ptolemy - New World Encyclopedia
Ptolemy, or in Latin Claudius Ptolemaeus (ca 90 – ca 168 C E ), was a mathematician, philosopher, geographer, map maker, astronomer, theologian, and astrologer who lived in Alexandria, Egypt
- Claudius Ptolemy: The Famed Alexandrian Mathematician and Astronomer
Claudius Ptolemy (c 100 – c 170 AD) was a towering figure in the ancient world, renowned for his extensive contributions to various fields of science His life and works left an indelible mark on mathematics, astronomy, astrology, geography, and music theory
- Ptolemy - Simple English Wikipedia, the free encyclopedia
Ptolemy's system involved at least 80 epicycles to explain the motions of the Sun, the Moon, and the five planets known in his time He believed the planets and sun moved around the Earth in this order: Mercury, Venus, Sun, Mars, Jupiter, Saturn [3] This system became known as the Ptolemaic system
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