Why astrology doesn't work

The survival and longevity of astrology has been dependent on an astrological community that will, under no circumstances, allow it to fail. Consequently, a large array of ad hoc hypotheses (escape routes) have been marshaled over the years to prevent contrary evidence from being used to confront central tenets of astrology. The result is a closed system with little, if any, empirical grounding. It is further argued that the fit of people to birth charts (horoscopes) lies in several unremarkable, lax rules of astrological interpretation.