← Explore on the interactive map

Johannes Kepler

Type Figure Region Holy Roman Empire Time c. 1571–1630 Also known as Kepler

German astronomer and mathematician of the Holy Roman Empire, discoverer of the laws of planetary motion.…

Timeline

  1. 1601–1609Prague · PragueAppointed by Rudolf II to take over Tycho's observational legacy after Tycho's death; in Prague he organized and analyzed Tycho's Mars observations, overcoming the problem of Mars's orbit through years of calculation, laying the data and theoretical foundation for the laws of planetary motion.
  2. 1609–1610Prague · PragueIn 1609 he published Astronomia Nova, proposing elliptical planetary orbits and the area law; that same year he wrote Ad Vitellionem paralipomena on the principles of the telescope. In 1610 he wrote to Galileo congratulating him on the discovery of Jupiter's moons, publicly supporting his observational results.

Sources