Astrology is outside my field of expertise. (Along with a hell of a lot of other stuff, of course.) But your mentioning the astrological dimension brings up something else I've always felt strongly about. And that is: whoever the people were who wrote the Gospel accounts they were emphatically not the naive peasant/worker types - which is the impression you get from Sunday School - but instead they were well-educated and sophisticated and expected their writings to be read by a similar class of people.
Alas, the whole field has been dumbed down - like most of modern education!