Musica Universalis (the movements of the celestial bodies as music)
Kepler wrote:
"The heavenly motions ... are a continuous song for several voices, perceived not by the ear but by the intellect, a figured music which sets landmarks in the immeasurable flow of time."
It is however possible to translate that which Kepler saw as only perceivable by the intellect to also be perceivable by the ear.
Whenever a soundwave is doubled or halved in frequency, it retains the 'flavour' of the original pitch. This can be applied to any periodic cycle, including the orbits of the planets (method explained:
http://homepages.tesco.net/gregskius/oe.html).
These are the duration in seconds of our star’s planets (and Pluto):
Mercury: 0.453028141, 0.906056282, 1.812112564, 3.624225128, 7.248450256, 14.49690051
Venus: 0.578586448, 1.157172895, 2.314345791, 4.628691582, 9.257383163, 18.51476633
Earth: 0.470244884, 0.940489769, 1.880979538, 3.761959076, 7.523918152, 15.0478363
Mars: 0.442216873, 0.884433746, 1.768867493, 3.537734985, 7.075469971, 14.15093994
Jupiter: 0.697366839, 1.394733678, 2.789467356, 5.578934712, 11.15786942, 22.31573885
Saturn: 0.432755629, 0.865511258, 1.731022516, 3.462045032, 6.924090064, 13.84818013
Uranus: 0.617729291, 1.235458581, 2.470917163, 4.941834326, 9.883668652, 19.7673373
Neptune: 0.605743574, 1.211487148, 2.422974297, 4.845948594, 9.691897187, 19.38379437
Pluto: 0.455707172, 0.911414343, 1.822828687, 3.645657373, 7.291314746, 14.58262949
And in hertz (cycles per second):
Mercury: 2260.345235, 1130.172618, 565.0863088, 282.5431544, 141.2715772, 70.6357886
Venus: 3539.6612, 1769.8306, 884.9153001, 442.45765, 221.228825, 110.6144125
Earth: 2177.588813, 1088.794407, 544.3972033, 272.1986017, 136.0993008, 68.04965042
Mars: 2315.605899, 1157.802949, 578.9014747, 289.4507373, 144.7253687, 72.36268433
Jupiter: 2936.761379, 1468.38069, 734.1903448, 367.0951724, 183.5475862, 91.7737931
Saturn: 2366.231498, 1183.115749, 591.5578744, 295.7789372, 147.8894686, 73.9447343
Uranus: 3315.368124, 1657.684062, 828.8420311, 414.4210156, 207.2105078, 103.6052539
Neptune: 3380.968593, 1690.484297, 845.2421483, 422.6210742, 211.3105371, 105.6552685
Pluto: 2247.057022, 1123.528511, 561.7642555, 280.8821277, 140.4410639, 70.22053193
In 2006, Greg Fox took the above orbital periods and divided them until their frequencies fell within the human acoustic range. This gave him six octaves of "planetary notes" for each planet. He called the resulting “music”: “Carmen of the Spheres”. It can be heard and downloaded at:
http://www.archive.org/details/GregFoxCarmenoftheSpheres
Thanks to Alcibiades for that one!
