The Geocentric or Ptolemaic Model put the earth at the center of the Universe. The Heliocentric Model postulated by Copernicus and, before him, Aristarchus, places the Sun at the center of the Solar System. Galileo's observations proved the validity of the Heliocentric Model.
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that the world was heliocentric not geocentric aka sun centered universe and earth centered universe
The Geocentric Theory states that the Earth is the center of the universe, and that all other objects orbit around it. The Heliocentric Theory states that the Sun is the center of the universe, and all other objects orbit around it. Of course, the Heliocentric Theory is correct, since all astronomical objects orbit around the Sun.
A geocentric theory is one that states the universe is centered by Earth. Geo means earth. The old Ptolemaic Model of the universe has earth as the center. A heliocentric theory is one that is centered by a source of heat. Helio = heat. It basically states that the sun is the center of our galaxy. (Copernican Model)
Geocentric theory
Geocentric theory