Ptolemy | Accomplishments, Biography, & Facts | Britannica
2024年11月19日 · 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.
Almagest - Wikipedia
Ptolemy wrote the Syntaxis as a textbook of mathematical astronomy. It explained geometrical models of the planets based on combinations of circles, which could be used to predict the motions of celestial objects.
Claudius Ptolemy - World History Encyclopedia
2023年9月7日 · Claudius Ptolemy is best known for being a 2nd-century Alexandrian astronomer who created a model of the universe with Earth as its centre. Ptolemy's Almagest book became the standard work on astronomy until the 17th century.
Claudius Ptolemy - Biography, Facts and Pictures - Famous Scientists
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.
Claudius Ptolemy | Greek mathematician and astronomer - New Scientist
Claudius Ptolemy was a Greek mathematician, astronomer and geographer who lived in the Egyptian city of Alexandria while under the rule of the Roman Empire.
Ptolemaic system | Definition & Facts | Britannica
Ptolemaic system, mathematical model of the universe formulated by the Alexandrian astronomer and mathematician Ptolemy about 150 CE. The Ptolemaic system is a geocentric cosmology that assumes Earth is stationary and at the centre of the universe.
Claudius Ptolemy: The Famed Alexandrian Mathematician and Astronomer …
2024年5月23日 · Claudius Ptolemy was a prominent Alexandrian mathematician, astronomer, astrologer, geographer, and music theorist who lived around 100 to 170 AD. He authored around a dozen scientific treatises, three of which had significant influence on Byzantine, Islamic, and Western European science.
Get to Know Claudius Ptolemy & His Geocentric Model of the …
2023年12月10日 · Claudius Ptolemy was a scientist from Alexandria who lived in the 2nd century CE. His main contribution to astronomy was a detailed Ptolemaic model of the universe, a geocentric system that has Earth in the center and planets revolving around it.
The Life of Astronomer Claudius Ptolemy - ThoughtCo
2019年7月3日 · Claudius Ptolemy (who lived in Romanized Egypt) was among the earliest astronomers to make and refine the observations underlying today's astronomy.
Ptolemy - Geographer, Astronomer, Mathematician | Britannica
2024年11月19日 · Ptolemy - Geographer, Astronomer, Mathematician: Ptolemy’s fame as a geographer is hardly less than his fame as an astronomer. Geōgraphikē hyphēgēsis (Guide to Geography) provided all the information and techniques required to draw maps of the portion of the world known by Ptolemy’s contemporaries.
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