Even today people confuse astronomy and astrology. It is not hard to see why when almost every newspaper has a horoscope and lots of adverts for astrology phone lines. Lets set the record straight.
Astronomy the scientific study of celestial bodies, for example the Sun, planets, starts, comets etc. The science is based on observation of the celestial bodies and the application of physical laws to such bodies. Mathematics and physics are essential in astronomy.
Astrology the belief that the position of celestial bodies influences the personality and human affairs. It is based on superstition and no physical mechanisms have been established. The superstition does not apply the scientific method and in no way follows modern scientific principles.
In short, astronomy and the closely related astrophysics and cosmology add to the human understanding of nature and our place in the Universe. Astrology is a superstition that people exploit to make money.
It is of course true that the origins of astronomy lie in astrology. Careful observations and recording of data was necessary in order to write astrological charts. One could equally argue that chemistry owes a lot to alchemy. But we have come a long way in our thinking and philosophy. Astronomy and chemistry are sciences.
Please do not confuse the two, it is rather insulting to all astronomers!