After years of struggle, Johannes Kepler finally had the tools and data to wage what he called his “War with Mars.” Rejecting ancient assumptions he used Tycho Brahe’s observations to discover his first two laws of planetary motion. His New Astronomy not only redefined celestial mechanics but transformed astronomy from a geometric art into a true physical science. Support the showSupport the show: buymeacoffee.com/completehistoryofscience Contact: [email protected]: https://bsky.app/profile/gethinrichards.bsky.socialMusic Credit: Folk Round Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License