The geocentric model (in Greek: geo = Earth and centron = center) of the universe is a paradigm which places the Earth at its center. Common in ancient Greece after the discovery of the approximately spherical shape of Earth, it was believed by both Aristotle and Ptolemy. Most Greeks assumed that the Sun, Moon, stars, and planets orbit Earth. Similar ideas were held in ancient China. The geocentric model assumes a spherical Earth; thus it is not the same as the older flat Earth model. Also, according to this model, ...

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