"I used to measure the skies, now I measure the shadows of Earth.Although my mind was sky-bound, the shadow of my body lies" ― Johannes Kepler From Johannes Kepler Scientist Added on 1/31/2026 About Johannes Kepler Johannes Kepler was a German astronomer and mathematician who formulated the laws of planetary motion. His work provided essential foundations for modern astronomy and celestial mechanics. Born: 1571-12-27 Died: 1630-11-15 View all quotes from Johannes Kepler