Just FYI, and as some interesting ammunition for the debates flaring up around here, I watched a study done on the streets of London (well, watched via a Richard Dawkins documentary) where they got random passers-by to listen to their horoscope and say whether or not it suited them. Eleven out of every twelve participants, however, were given the wrong horoscope - e.g a person who was a virgo actually got a taurus horoscope, but with the word taurus replaced by virgo. Despite this, almost everyone who got the wrong horoscope still said that it suited them perfectly.
I believe that this is an accurate enough study to agree that the whole thing is faffy enough that it's not tied down to anything so someone can say "Mmmmyeah sounds about right" because no drastic claims are made. You never get a Horoscope that says "You clip your left toenail at 11:23 every Wednesday and secretly fancy you flat-chested secretary for reasons that are unknown to you." Moreover, people generally want to believe it, and thus they will, just showing you the power of perspective.
I really don't see how anyone takes these things seriously. I'm not enforcing an emphatic war against horoscope readers, I'm just sadly disappointed. I'd always hoped this was one of those things that the human race had reduced to mild coincidences that were occasionally somewhat on the mark and deserving of a brief smile before flipping the page or navigating to another site, whereupon lies global news of artistic, political, scientific or social events. I suppose not.
The fact that allignments of planets dictate our day-to-day lives is about as ludicrous as thinking that all 6.7 billion humans can be sorted into 12 vague categories.