What is the main difference between the geocentric and heliocentric model?

The main difference between the geocentric and heliocentric models lies in their descriptions of the solar system's structure. The geocentric model, proposed by ancient astronomers like Ptolemy, posits that Earth is at the center of the universe, with all celestial bodies orbiting around it. In contrast, the heliocentric model, formulated by Copernicus, asserts that the Sun is at the center, with Earth and other planets orbiting around it. This shift in perspective was fundamental to the development of modern astronomy.