part of Astrological Glossary
- is preferred by Western astrology. The tropical zodiac begins at the vernal equinox. In the northern hemisphere, the vernal equinox is equivalent to 0°Aries and the point opposite (the autumnal equinox) to 0° Libra. The precession of the equinoxes causes the vernal equinox to move backwards through the zodiac which is a basic difference between the tropical zodiac and the sidereal zodiac where the latter does not move with relation to the tropical one over longer periods of time. The precession causes the sidereal zodiac to move 1° every 72 years in relation to the tropical zodiac. The difference (Ayanamsa) between the sidereal and tropical zodiacs reaches these days almost 25°. Astrologers’ opinions on both zodiacs are divided, generally, the tropical zodiac is considered to be more suitable for the native’s psychological characteristics, while the sidereal zodiac is often used to predict events.
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