Johannes Kepler, German astronomer who discovered three major laws of planetary motion. His discoveries turned Nicolaus Copernicus’s Sun-centered system into a dynamic universe, with the Sun actively pushing the planets around in noncircular orbits. Lea
Professor of History and Science Studies, University of California, San Diego, at La Jolla. Author ofJohannes Kepler's Adoption of the Copernican Hypothesisand others. Robert S. Westman Fact-checked by The Editors of Encyclopaedia Britannica ...
What was Johannes Kepler’s profession? When and how did it begin?
Johannes Kepler - Astronomy, Laws, Heliocentrism: The ideas that Kepler would pursue for the rest of his life were already present in his first work, Mysterium cosmographicum (1596; “Cosmographic Mystery”). Kepler had become a professor of mathematics