Astrology originated in Mesopotamia around the 3rd millennium BC and spread to other ancient cultures like India and Greece. It involves interpreting the influence of stars and planets on human destiny and affairs. According to Greek tradition, the heavens are divided into 12 zodiac constellations whose bright stars cast spiritual influences over human life. Though astrology requires a geocentric worldview shattered by Copernicus, interest has continued into modern times with many still believing astrological signs influence personality.