Hi Alea........
Kepler took up Pythagoras's harmonics of the planets....
In the 17th century, Johannes Kepler, also influenced by arguments in Ptolemy’s Tetrabiblos, Optics and Harmonica,[7] compiled his Harmonices Mundi ('Harmony of the World'), which presented his own analysis of optical perceptions, geometrical shapes, musical consonances and planetary harmonies. According to Kepler, the connection between geometry (and sacred geometry), cosmology, astrology, harmonics, and music is through musica universalis.[8] Kepler regarded this text as the most important work of his career, and the fifth part, concerning the role of planetary harmony in creation, the crown of it.[9] His premise was that, as an integral part of Universal Law, mathematical harmony is the key that binds all parts together: one theoretical proposition from his work introduced the minor planetary aspects and harmonics into astrology; another introduced Kepler’s third law of planetary motion into astronomy.[10]
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