Johannes Kepler - A short biography. The Galileo Project: Johannes Kepler - Illustrated article with references. Johannes Kepler and his Laws of Planetary Motion - Short biography and explanation of his laws. More Kepler, by Michael Fowler - Part two of a biography, discussing Kepler's investigations of planetary motion and gravity. Tycho Brahe and Johannes Kepler - Short biographies. Astronomy History - Johannes Kepler - Brief biography highlighting his status as a defender of Copernicus and a formulator of planetary-motion laws. Starry Messenger: Johannes Kepler - Biography, and information on Kepler's mathematical techniques, poetry, and interest in astrology. From the Whipple Museum of the History of Science. Johannes Kepler and the Music of the Spheres - An article by David Plant describing Kepler's astrological beliefs.