Music of the Spheres

Pythagoras first identified that intervals between harmonious sound frequencies form simple numerical ratios. He also thought that proportions in the movements of celestial bodies i.e., planets as a form of music. This theory was later developed by the 16th century astronomer Kepler, who attempted to explain the proportions of the planetary distances in terms of music, the "Music of the Spheres." But he did not believe this music was audible, but perceived only by the soul.

Shakespeare also referred to it in his "The Merchant of Venice."

"There is not the smallest orb,

But in his motion sings,

Such harmony is in immortal souls"

Many composers have created works with this title, notably Josef Strauss, who composed a waltz (op.235). Recently the British rockband, Coldplay, have recorded an album with this title, which is set in a fictional planetary system containing 9 planets, 3 natural satellites, a star & a nebula, each having a track.