modern astrology is very different from astronomy

It's not only different, its a load of bollocks. Today's t-shirt (illustrated people i think) has some kind of modern day astrological chart on it. The circles look pretty, but that's about it. I'm not dismissing the influence ancient astrology has has on modern day science, it's just all that rubbish about you date of birth and star sign is just that - a load of rubbish.