Astrological sign of a sign are together sufficient to define it, they can be grouped to indicate their symbolism. The first four signs, Aries, Taurus, Gemini and Cancer, form the group of personal signs. The next four signs, Leo, Virgo, Libra and Scorpio form the group of interpersonal signs. The last four signs of the zodiac, Sagittarius, Capricorn, Aquarius and Pisces, form the group of transpersonal signs. Dane Rudhyar presented the tropical zodiac primary factors, used in the curriculum of the RASA School of Astrology. The tropical zodiac is the zodiac of seasonal factors as opposed to the sidereal zodiac (constellation factors).
Steve Zodiac thought to have taken his last name from either Sylvia and Gerry Anderson's astronaut in 1960s television show "Fireball XL5", or his Selmer Zodiac 100-watt amplifier, which had to be used at full volume to get the distortion and sustain which was fundamental to his sound. Zodiac's work contributed greatly to modern heavy metal and inspired many heavy metal bands of today. He is directly quoted by giants like Metallica as a heavy influence. He prematurely quit Vardis in the mid-1980s (which resulted in outcry amongst rock 'n' roll fans across Britain), due to mounting tensions between himself and several