Copernicus observed that the planets revolve around the Sun and Kepler correctly defined the orbits of the planets.
Heliocentrism is the heavenly and an astronomical model in which the Earth and other planets revolve around the Sun at the center of the universe.
Heliocentric theory is the tremendous model which was developed by the Nicolaus Copernicus and was published in 1543. The model describes that the Sun is positioned in the center and the Earth with other planets revolve around it.
Basically, heliocentric theory of the Copernicus led to the advancement of knowledge.
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