I am a professional astrologer myself and I have been practicing astrology for the last 17 years. And I have been able to convince a couple of skeptics of the validity of astrology. Although astrology is a valid field of study, it is not subject to the scientific method. Therefore, astrology is not a science and should not be called a science logic. Astrology is concerned with mathematics, motion, matter etc. Astrology is like determining personality traits and generally predictions concerning a person’s life experience.
Generally calling astrology a science in the presence of someone who actually practices science(like the skeptic who became a client of mine, who is the physicist by professional) is a great way to alienate him or her. Also, there are fundamental things about astrology that we don’t and probably will never-know.