One key feature of the modern model of the solar system that was not found in ancient models is the heliocentric nature of the solar system. Ancient models, such as the Ptolemaic model, considered Earth to be the center of the universe with other celestial bodies, including the Sun, revolving around it. In contrast, the modern model, known as the heliocentric model, correctly places the Sun at the center of the solar system, with planets, including Earth, orbiting around it.
