In ancient times, the Greeks and Romans based their system of gods on what they believed was up in the sky. Zeus, who equates to Jupiter in Roman myth, and the other gods and goddesses were based on the planets visible to the ancients. Astrology was similarly popular in Babylon and Egypt, and it also rose in the Middle East, India and China.
Modern astrology has changed with the discovery of new planets: first Uranus in 1781, then Neptune and Pluto, as well as the four feminine-energy asteroids. These three planets have a stronger effect on generations as a whole rather than individuals, but they still have an important place in modern astrology.