The egocentric model, also known as the geocentric model, posits that the Earth is at the center of the universe, and all celestial bodies, including the Sun, Moon, stars, and planets, revolve around it. This model was a prominent theory in ancient and medieval astronomy, particularly associated with the work of the Greek astronomer Claudius Ptolemy in the 2nd century AD.
The Ptolemaic system provided a comprehensive framework for understanding planetary movements and was widely accepted until the Copernican revolution in the 16th century introduced the heliocentric model, which placed the Sun at the center of the solar system. The geocentric model was eventually disproven through the work of astronomers such as Nicolaus Copernicus, Johannes Kepler, and Galileo Galilei, leading to our current understanding of the solar system and the universe.
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