Johannes Kepler was one of the most important figures in the world of early astronomy and physics. One of his most famous contributions are the discovery of the relationships between periods of orbits for celestial objects and their respective orbital radius.
Johannes Kepler picture from: https://nmspacemuseum.org/inductee/johannes-kepler/
Background picture from: https://www.youtube.com/watch?reload=9=bENTuGmw0Sg