Astrology is a method of predicting mundane events based upon the
assumption that the celestial bodies—particularly the planets and the
stars considered in their arbitrary combinations or configurations
(called constellations)—in some way either determine or indicate changes
in the sublunar world.
Special relations were believed to exist between particular celestial
bodies and their varied motions, configurations with each other, and the
processes of generation and decay apparent in the world of fire, air,
water, and earth.