Historical models of the solar system
Space Telescope Science Institute, Graphics Dept.
These simplified diagrams show an Earth-centered and a sun-centered solar system. In the ancient world, people thought that the sun and other objects orbited Earth (shown in the diagram at left). However, Polish astronomer Nicolaus Copernicus' models of a sun-centered solar system (shown in the diagram at right) ignited a change in that thinking in 1543.