Astrology is the belief that the position of celestial bodies at the time of your birth influences your personality and life course.

Here’s why this is nonsense.

First, empirical tests of astrological predictions show that they don’t work. A meta-analysis of more than 40 controlled studies shows that expert astrologers perform no better than chance , even at predicting basic personality traits such as extraversion . Double-blind tests show that astrological predictions are not supported by the evidence . Second, there is no known mechanism by which the planets could influence your personality.