Astrology, sometimes called astromancy by its opponents, is the mass cultural delusion that the apparent position of the sun and planets relative to arbitrarily defined "star signs" at the time of your birth somehow affects your personality and future.[2]
According to the Faculty of Astrological Studies, astrology "explores the meaningful connection between mankind and the wider cosmos, the relationship between the movements of the planets and the inner world of human consciousness and motivation."[3] Some supporters like to emphasise that astrology is complex, and goes beyond just the simple "Sun Signs" people are used to[4] and others like to add amusing little rationales such as “Every human being contains every sign and every planet.”[5] Stripped of any fancier and woo-like terms, it is the belief that huge balls of rocks, liquids, gases, and nuclear fusion reactions billions or trillions of miles away from Earth can affect the financial, sexual, emotional, and employment situations of individual carbon-based life forms on one specific planet. Put like that, it sounds absurd, yet unlike many practitioners of alternative medicine who like to hide the absurdities behind complex terminology or assertions of mysterious energies, even fairly "advanced" astrology is still pretty open about the fact it's predicting the future based on staring into the sky.[6]
This widely believed idea has never produced any worthwhile and conclusive predictions, in spite of having several different formulations across disparate cultures. As far as astrology produces falsifiable predictions, it has been thoroughly falsified as no better than guesswork. As all the "evidence" that it is true is only anecdotal, selectively reported, or made up, it is an excellent example of a woo explanation for something quite mundane. To sum up, astrology can be described in a few words: the Forer effect in action.
https://rationalwiki.org/wiki/Astrology