Johannes Kepler was a German mathematician, astronomer, and polymath who lived from 1571 to 1630. A central figure in the Scientific Revolution, he is most famous for discovering the three laws of planetary motion. His work helped transition astronomy into a branch of mathematical physics, bridging the gap between ancient cosmology and modern science. Beyond his celestial studies, he made significant contributions to optics, music theory, and mathematics, while also serving as an imperial mathematician and an assistant to Tycho Brahe.