Astronomy History - Johannes Kepler: Brief biography highlighting his status as a defender of Copernicus and a formulator of planetary-motion laws.
Johannes Kepler: A short biography.
Johannes Kepler: Includes detailed biography, online links, outlines of some of his works, quotes, and reading list.
Johannes Kepler and the Music of the Spheres: An article by David Plant describing Kepler's astrological beliefs.
Kepler, Johannes (1571-1630): Encyclopedia entry provides a brief biography of this German astronomer and mathematician.
More Kepler, by Michael Fowler: Part two of a biography, discussing Kepler's investigations of planetary motion and gravity.
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.
Tycho Brahe and Johannes Kepler: Short biographies.