Geocentric model

The geocentric model (in Greek: geo = earth and centron = centre) 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.

See also

• Celestial sphere
• Tychonian system