One feature of the modern model of the solar system that was not found in ancient models is the concept of Heliocentrism. In ancient models, such as the Ptolemaic system, it was believed that the Earth was at the center of the universe, and all other celestial bodies including the Sun, Moon, and planets revolved around it in complex circular orbits. However, the modern model of the solar system introduced by Copernicus and later refined by Kepler and Galileo, established that the Sun is at the center of the solar system, and all planets, including Earth, orbit around it in elliptical paths. This heliocentric model of the solar system is a key feature of our modern understanding.
