OT: Angel Who Cares
I think you asked earlier if Da Vinci's Art could have elements of Astrology.
Yes. All art from the "pre-puritan" period was on order from the Church or Royalty (State). At that time the Church still used Astrology in their understanding, so did everyone else. However, all artists (especially a Renaissance Man, such as Da Vinci) would have to study the positions of the stars and their meanings as oh, let us say we would English 101 or Math 101. At that point in time, everything had meaning, every little tiny thing in a painting, including positions of stars. Well, they were meant to portray Gods, Myths, Beliefs, and more so. Every point you see in a painting is there for a reason and a message, every color, every character be it human or not, and so forth. Quite intense studying actually if you care to.
Here is one of my favorites paintings by a different artist, it is amazingly simple to look at yet loaded with enough to keep us all occupied for quite a while.
http://arturovasquez.files.wordpress.com/2008/07/botticelli.jpg
I wish I could see Da Vinci's Sistine Chapel in person, that would be all of the heavens in one breath for us.