Astrology is there to define the gullible amongst us. The constellations themselves require a major allowance of artistic license for a start. As has been pointed out previously, they only LOOK like they are these shapes because of our place and time in the universe. They are in fact millions of light years apart and are in the process of, to us, very slow change meaning that if the human race survived for millions of years the constellations would change. Toatal and utter bunkum invented by someone when the general populace didn't know any better.