Astrology is an ancient Indian Science which explains planetary motions and positions with respect to time and their effect on humans and others on Earth. Astrology can be traced thousands of years back. In Astrology predictive principles are based on the movement of planets with respect to stars, zodiac signs and zodiac houses. According to Astrology, there are 27 constellations made up of 12 zodiac signs, 9 planets and 12 houses with each house and planet representing some aspect of human life.