The solar system model where the sun was proposed as the center is called the heliocentric model.

This model was first proposed by Aristarchus of Samos in the 3rd century BC, but it was Nicolaus Copernicus in the 16th century who revived and developed it, providing a more detailed and accurate description.

Prior to this, the prevailing model was the geocentric model, which placed the Earth at the center of the universe, with the Sun and other planets revolving around it.