Um, well Prisca, astrology has nothing whatever to do with "stars" anyway. Astrology claims to measure your orientation to certain cosmic, astral, spiritual, and other energies at the time of your birth as indicated by your relation to the planets at that time.
And just as a clock does not create time, but only measures it - astrology does not create anything in you either but only measures your orientation to the above named energies and to their relative strengths at the moment of your birth.
Having said that, I must also say that I'm with Alan in recognizing astrology for the steaming pile that it is. I have drunk that cup to the dregs and must say that it leaves me intellectually empty. I have used it as an ice breaker and conversation maker at various parties in my long and checkered relationship with woman to good, even great effect. But that's as much good as I've ever gotten out of it. Which, when you think of other approaches and come-ons, isn't too bad at all. But when I want to really know the future, I wait for it to arrive.
francois