Western astrology is the system of astrology most popular in Western countries. Western astrology is historically based on Ptolemy’s Tetrabiblos (2nd century BCE). Western astrology is an ancient Babylonian practice. It later evolved in Greco-Roman culture. The zodiac concept divides the sky into twelve equal sectors. It first emerged in Babylon around the 5th century BCE. The Babylonians linked the zodiac to constellations along the ecliptic. This is the Sun, Moon, and planets’ apparent path across the sky. There are 12 signs in western astrology and it takes its approach as looking at an individual person’s birth using the placement of planets on that date. Western astrology is largely horoscopic, that is, it is a form of divination based on the construction of a horoscope for an exact moment, such as a person’s birth, in which various cosmic bodies are said to have an influence.