in the old days magick was for outlaws, now its embraced by the popular culture, yet popular culture won't call it magick because by association magick is uncool, but magick is quite scientific in it's process, it must be tested under scientific conditions, repeated to give the same result, conditions must remain the same otherwise the result will vary.
herein lies a problem and why magick is tricky.
the condition of mind requires a discipline, this is fine tuned by the ritual and mediative aspects of the magickian, those old wizards knew what they were doing. 
those mantra chants, the yoga and visualisations all had purpose, the mind needs training, this is evident in all traditions, and the training is endless. the point is until one can not think of an elephant, when told not to think of an elephant, one is unprepared for magick to work effectively and therefore the results if any will be unpredictable. the lust for the result is also a mental exercise that requires discipline and training, for how can one enact an act of magick and not have a desire for a result, it's counter intuitive. yet counter intuition is the magickians currency, it's an abolishment of reason that gets the result. science folds back upon itself. 
if one uses astrology, one must accept that the universe and all it's components do not repeat themselves exactly, the variations are infinite yet the patterns may revolve. such approximations may result in different results, which is why it's known as chaos. 
the modern practitioner forgoes astrology for an internal alignment, quantum information.
the mind transcends single points, the position of a planet is never really in a single point anyway, it's part of a cosmic ballet, as we are. the chaos magickian would probably say something like, 'rocks n space only cast an influence if you want them to.'