Johannes Kepler Theorized That Each Planet Sings a Song, Each in a Different Voice: Mars is a Tenor; Mercury, a Soprano; and Earth, an Alto
Johannes Kepler determined just how the planets of our solar system make their way around the sun. He published his innovative work on the subject from 1609 to 1619, and in the final year of that decade he also came up with a theory that each planet sings a song, and each in a different voice …