How Vedic differs from Western Astrology: Unlike Western astrology (which uses the tropical zodiac anchored to the seasons), Vedic astrology is sidereal, meaning its zodiac is anchored to the fixed, distant stars. Because of the Earth's axis wobble over thousands of years, there is an approximate 23° difference, which often shifts your primary sun sign to a different constellation. Additionally, Vedic astrology places a much heavier emphasis on the Moon sign (representing the mind and emotions) rather than the Sun sign.