There are two scientific phenomena (there are more but for the purposes of this, two) that prove astrology is wrong.
The first is the Precession of the equinoxes. The earth's axis is not fixed, it moves ever so slowly. The result is that every 60 years or so the apparent positions of the stars in the sky are off by a day. Thus about every 2000 years or so the the zodiac is off by a full month. For example I am an Aries. That's supposed to mean that the constallation Aries was in the horizon when I was born. And it would have if I was born 2000 years ago, but when I was born Pisces was in the horizon. So am I an Aries as I have always been told or am I really Pisces? So, all the people that live their lives by the zodiac are a full sign off!!!
The second is the psychological phenomenon known as the Forer effect. When people are given a very general and catchall evaluation of themselves, most of us aren't objective in examining it and will accept it as an accurrate representation of ourselves. The common way to demonstrate this effect (and the method used by Forer) is to give a large number of people the same horoscope and see how they rate it. It's interesting how improbably identical 80% of us are!!!
Also, this is one of the few things to be skeptical about (unlike UFOs and bigfoot) that is entirely testable and it fails miserably. Why do people trust this crap?
Here's a do it yourself experiment, have a friend cut out a horoscope, separate the sign from the reading, and code them. Then you read the readings only and pick out which one you think describes you the most, go to the code and find the sign.
Astronomy will always be 100X more filled with wonder and mystery than astrology ever will.
