The Heliocentric theory.
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It made significantly better predictions of planetary positions in our sky.
It offered more natural explanation for the apparent retrograde motion of planets in our sky.
Copernicus used perfect circles for the orbits of the planets.
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)
that the world was heliocentric not geocentric aka sun centered universe and earth centered universe