In Ptolemy's geocentric model of the universe, the Sun, Moon, and each planet orbit a stationary Earth.

- Image ID: BCE67E
In Ptolemy's geocentric model of the universe, the Sun, Moon, and each planet orbit a stationary Earth.
Image ID: BCE67E
illustrations, illustration, Ptolemy, Ptolemaic, equant, model, system, geocentric, universe, Earth, planet, planetary, sun, moon, apogee, circle, shape, deferent, perigee, epicycle, orbit, science, astronomy, solar system, geometry, geometrics, geometrical, applied, mathematics, mathematical, pre-Euclidean, diagram, figure, parchment, paper, horizontal, vertical, square