1. Despite the long history of astrology no one has devised a reproduceable experiment to demonstrate that it works. Of course astrological techniques are not perfect predictions but it should be possible to define some things that can be correctly predicted by astrology more often than by any other method. If not then astrologers and their followers have no basis for claiming that astrology works.
2. In the UK, over half the population are thought to believe in astrology. And half of them think it's a science !