This wobble - called precession - is caused by the gravitational attraction of the moon on Earth's equatorial bulge. Unbeknownst to the ancient astrologers, Earth continually wobbles around its axis in a 25,800-year cycle. Astronomers call this the vernal equinox and it occurs as the ecliptic and celestial equator intersect on approximately March 21.Īround 600 B.C., the zero point was in Aries and was called the "first point of Aries." The constellation Aries encompassed the first 30 degrees of the ecliptic from 30 to 60 degrees was Taurus from 60 to 90 degrees was Gemini and so on for all 12 constellations of the Zodiac. The first day of spring in the Northern Hemisphere was once marked by the zero point of the Zodiac.
However, a phenomenon called precession has altered the position of the constellations we see today and has resulted in a shift of the zodiac constellations. Water - Cancer, Scorpio, Pisces (imaginative and emotional)Īir - Libra, Aquarius, Gemini (quick and animated, tendency to intellectualize feelings)Įarth - Capricorn, Taurus, Virgo (quiet and slow reactions, slow to change emotionally)
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