Ptolemy

(c. 100 - c. 170)

A Greco-Egyptian geographer and astronomer, Ptolemy is most famous for his belief that the solar system was centered around Earth and that all the other planets and the sun and moon revolved around it—an idea that was later supplanted by Copernicus and Kepler’s heliocentric model. He also recorded the latitudes and longitudes of thousands of known locations and wrote about the mathematics of music and astrology.