http://www.skyscript.co.uk/kepler.html leads one to an essay titled "Kepler and the Music of the Spheres" by David Plant. I, personally, can't resist anything that starts off with this quote:
"The heavenly motions... are nothing but a continuous
song for several voices, perceived not by the ear but by
a figured music which sets landmarks
in the immeasurable flow of time."
John Banville: Kepler, (Minerva 1990)
I was afraid it would be a little dry, but I found the juxtaposition of music and science to be fascinating.
http://www.glassarmonica.com/disc/spheres/ leads to a page advertising the music of William Zeitler. I include it here for the sheer serendipity of it, because one almost never finds music for the glass armonica nowadays, and because the page opens thusly:
With Music of the Spheres you'll find twelve pieces that were inspired by the ancient Pythagorean conception of the Universe. This musical journey begins at Earth, through the planets and to the Great Beyond. Passionate and mystical, reveling in the wonders of the Cosmos. Also includes a wealth of musical symbolism based on almost a year of William's research into ancient through modern cosmology.
This site -- http://www.harbour.sfu.ca/~hayward/van/glossary/spheres.html -- is notable for its brevity, and is full of lovely, classical references. If you read all the way to the tiny print at the bottom, you then discover that it's part of the Van Morrison website.
For those with music in the realms of science fiction on their minds, I offer this: http://www.space.com/businesstechnology/technology/technovel_sunsound_041214.html What originally attracted me to the site was the mention of "Bass Notes" in the title (I have a penchant for both the bass guitar and the bass fiddle). What I discovered was fascinating and curious, positing what the author referred to as "solar ultrasound."
http://www.nous.org.uk/James.html leads to a brief review of Music, Science and the Natural Order of the Universe by Jamie James, written by one Paul Taylor. He begins thusly: The reader will find that this is much more about musicians' ideas about science and nature than it is about science and nature themselves and their relation to music. This prospect sounded wonderful and intriguing to me, but Mr. Taylor was less than thrilled; this makes for an amusing little blurb. On the other hand, it also leads back to it's source, a site devoted to "Music and Science." If you're as eclectic and curious as I am, you may want to give http://www.nous.org.uk/musicscience.html some perusal.
Then there was this little page: http://peyote.com/jonstef/spheres.htm (which I rather fancied). Very unpretentious in its text, yet radical in how matter-of-factly it treats its subject. I went back to its source page as well, and I think I might devote a separate post to that shortly. It really impressed me.
There were also several links in the midst of my search to Amazon.com for various books. I confess that I didn't check any of them out, but they're out there.