Who was Claudius Ptolemy?
Claudius Ptolemy was a Greek-Egyptian astronomer, mathematician and geographer. He understood the universe in the same way as Plato and Aristotle, but as an empiricist he differed from them in his approach. Ptolemy was the last great representative of Greek astronomy, a great observer whose main work influenced Arab and European astronomy. He was the creator of the geocentric model and the Ptolemaic system.
The work of Claudius Ptolemy
In his day it was said that the earth was immobile, and the sun, moon and planets would rotate around it, attracted by a large sphere. In addition to his self-developed star catalogue, Ptolemy provided measurements of the Sun and Moon. His geocentric model, which called the Earth the center of the universe, is now known as the Ptolemaic system. The geocentric theory was his most important creation. Ptolemy was looking for a way to answer the most important questions about planetary motion. In his system, each of the planets moves through two or more spheres, one centered on the Earth and the other the epicycle.
Thanks to his intensive studies, he achieved the construction of sundials and the ability to determine horoscopes. He also studied the properties of light such as reflection and refraction. Ptolemy worked on the maps of today's known world and despite their errors they were used over a long period of time. In addition to his empirical work, he always assumed that the mathematical laws would have an effect on both music and celestial bodies.
Despite the errors in his theories, Claudio Ptolemy was an astronomer with a vision of the universe that he wanted to explain scientifically. In addition to astronomy, he also devoted himself to Astrology. He also left us his teachings about light. With his work, Ptolemy strongly influenced the thoughts and research of later astronomers and mathematicians.