WORLD HISTORY

Detailed explanation-1: -Ptolemy placed the Earth at the centre of his geocentric model . Using the data he had, Ptolemy thought that the universe was a set of nested spheres surrounding the Earth. He believed that the Moon was orbiting on a sphere closest to the Earth, followed by Mercury, then Venus and then the Sun.

Detailed explanation-2: -Assumptions of the geocentric model According to Penn State University, the ancient Greeks firmly held onto several scientific assumptions that formed the basis of the geocentric model: The Earth is the center of the universe and is stationary.

Detailed explanation-3: -geocentric model, any theory of the structure of the solar system (or the universe) in which Earth is assumed to be at the centre of it all.

Detailed explanation-4: -An astronomer named Eudoxus created the first model of a geocentric universe around 380 B.C. Eudoxus designed his model of the universe as a series of cosmic spheres containing the stars, the sun, and the moon all built around the Earth at its center.

Detailed explanation-5: -Key facts. Claudius Ptolemy was a 2nd century Greek mathematician, astronomer and geographer famous for his controversial geocentric theory of the universe, which would form the basis of our understanding of the motions of stars and planets for over than a thousand years.