Whats the deal with horoscopes?

This is a topic that really confuses me....the image thats floating though my head is a guy looking through a telescope, high on marijuana and writing what he thinks and publishing it... i mean iv seen the stars n stuff n i havent seen a full page article anywhere.... maby i need a stronger telescope hey? the thing that i keep thinking is that if they really can be trusted or they really have some truth in them then should ALL OF THEM be EXACTLY the SAME! i mean if im looking at a star wont the person next to me be able to see exactly the same star or will he's star be different so that that he can write a different article?.....just a thought....