How did the Copernican system of the world differ from the system of the world according to Ptolemy?

Ptolemy, in his views, considered the planet Earth to be the center of the solar system and the entire universe. Whereas Copernicus, with his revolutionary views at the time, held a completely opposite opinion. He put forward the theory of heliocentrism, according to which the Sun is the center of the solar system, and all the planets, including the Earth, revolve around it. In addition, Copernicus believed that many more systems of planets and their stars, similar to the solar system, could exist in the Universe.