I think this was also taught in the "Greatest Man that ever lived" book as well. I remember reading that and it making perfect sense to me. Man was I brainwashed.
I recently saw a show on the history channel that talked about the "sign" in the night sky that is mentioned in the Gospel. They showed how it could have simply been a convergance of 3 planets. However, to 3 astrologers this would have been a powerful sign.