The Harmonices Mundi

*The Harmonices Mundi* (The Harmonies of the World) is a 1619 book by Johannes Kepler that explores the connections between mathematics, astronomy, and music. Kepler investigated how planetary movements follow specific geometric patterns and ratios, similar to musical harmony. He believed that the universe’s structure reflects a divine order expressed through mathematical relationships, especially the ratios that create musical harmony. The work combines astronomy, geometry, and music theory to suggest that the universe is a harmonious, interconnected system governed by precise, elegant laws.