Have you ever heard the statement: "Looking for love in all the wrong places."? This can apply to astrologers looking for empirical proof in all the wrong places as well. Problem is: Astrology isn't a physical science. If astrology could be verified by physical facts, it would have been done long ago.
Although astrology isn't a religion, it nonetheless falls into the same category as religion. Astrology is a metaphysical science. Religion has no way to certify its claims either, so why doesn't science bash religion? Because religion doesn't claim to be verifiable through science. Why is this such a hard fact for astrologers to accept? Most astrologers tend to have some religious affiliations, which is an affirmation that Spirit has a place in their lives. I've never met an astrologer that claims to be an atheist. Then why is it so difficult for astrologers to accept that astrology is a spiritual science?
Astrology isn't a religion, nor should it ever be one; nevertheless, it is and always has been the source and foundation for all that is Spiritual in the universe. From galaxies, to stars, to solar systems, to living beings, astrology is the key to understanding how this all works together. Odd that astrologers stand up and deny the very thing they are trying to confirm. If astrology isn't an aspect of our spiritual lives, then it's all hocus pocus, meaningless, irrelevant to the purpose of life itself. Gee! It can't be proven empirically? So what!
At the level of humanity, astrology works on Soul. From the highest source of Spiritual power to the lowest level of organic being, the universe is wrapped in thought, and through the eons gives rise to sentient life that now looks back to the universe in reflection of its source and meaning. The greatest wonder and truth of all is that we live in a Spiritual universe founded on a mental structure in a physical reality, and we can come to know our relationship to it within the sanctity of our own Souls. The proof lives within, and can be found there. They that seek shall find.