Western astrology uses the four classical elements in connection with astrological charts and horoscopes. Astrologers use many ways to divide the Great Year into twelve astrological ages. Book VI contains astrological and numerological reasoning. The ascendant is very important in astrological chart interpretation. He was also an astrologer and predicted astrological events. Scales are also the symbol for the astrological sign Libra. The crescent remains in use as astrological symbol and astronomical symbol representing the Moon. First, it was an astrological and zodiacal symbol. The IAU defined the constellation boundaries without consideration of astrological purposes. "Aquarius" was the result of Rado's research into his own astrological sign. Other symbols for astrological aspects are used in various astrological traditions. Some tinctures were considered to represent astrological symbols. However, it sometimes has an astrological or symbolic meaning. As astrological symbol it represents the planet Mars. This is also known as ANUSHAM in Tamil literature and Astrological treatises.