I’m not an astrologer, myself, though my mother was, so I have a general understanding of how it all works and comes together. One of the questions I’m asked a lot is if astrology is read, why are there more than 12 types of people in the world? Why aren’t all geminis the same, how can they be different? How can something be true about one person and untrue for another with the same sign?
The reason for so much variation is because your sign (properly your ‘sun sign’) is just one component of 9 (or 10, depending) different planetary bodies (plus the moon and sun) that all combine to create the complex and individual you. In addition, constellations get involved, and then there are relationships to each other, horizon lines, and several other factors that go into an astrological chart!
Below is my astrological chart. In it, you’ll see a lot of strange symbols, numbers, and charts. I’ve circle in red the part that determines my ‘sign’ – all the rest of that is stuff that the layman doesn’t usually get into. Hopefully this will help explain why there are far more than 12 different types of people in the world.