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.
Ptolemy - Wikipedia
Claudius Ptolemy (/ ˈtɒləmi /; Ancient Greek: Πτολεμαῖος, Ptolemaios; Latin: Claudius Ptolemaeus; c. 100 – c. 170 AD) [1] was an Alexandrian mathematician, astronomer, astrologer, geographer, and music theorist [2] who wrote about a dozen scientific treatises, three of which were important to later Byzantine, Islamic, and Western European science.
Ptolemy I Soter - Wikipedia
Ptolemy I Soter (/ ˈ t ɒ l əm i /; Greek: Πτολεμαῖος Σωτήρ, Ptolemaîos Sōtḗr, "Ptolemy the Savior"; c. 367 BC – January 282 BC) was a Macedonian Greek [2] general, historian, and successor of Alexander the Great who went on to found the Ptolemaic Kingdom centered on Egypt.
Claudius Ptolemy - World History Encyclopedia
2023年9月7日 · Claudius Ptolemy (c. 100 to c. 170 CE) was an Alexandrian mathematician, astronomer, and geographer. His works survived antiquity and the Middle Ages intact, and his theories, particularly on a geocentric...
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.
Ptolemy - Simple English Wikipedia, the free encyclopedia
Ptolemy explained and extended Hipparchus's system of epicycles and eccentric circles to explain the Earth-centered theory of the world. 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.
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.
Ptolemy summary | Britannica
Ptolemy , Latin Claudius Ptolemaeus, (born c. ad 100—died c. ad 170), Greek astronomer and mathematician. He worked principally in Alexandria. It is often difficult to determine which findings in his great astronomical book, the Almagest, are Ptolemy’s and which are Hipparchus ’s.
The Life of Astronomer Claudius Ptolemy - ThoughtCo
2019年7月3日 · Claudius Ptolemy (often called Claudius Ptolemaeus, Ptolomaeus, Klaudios Ptolemaios, and simply Ptolemeus) was one of the earliest of these observers. He systematically charted the sky to help predict and explain the motions of the planets and stars. He was a scientist and philosopher who lived in Alexandria, Egypt nearly 2,000 years ago.
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.