Precession of the Equinoxes

The Earth hurtles through space at an average speed of 18.5 miles per second and it rotates on its axis at 1070 miles per hour at the equator.

It orbits the Sun in three hundred and sixty-five days, five hours, forty-eight minutes and forty-six seconds in one tropical year, and it turns on its axis every twenty-three hours, fifty-six minutes and four seconds.

The Earth is not a perfect sphere due to the gravitational attraction of the Sun and Moon on the equatorial bulge of the Earth which causes the rotation of the Earth to wobble on its axis like a fast spinning top. This unique motion results in the precession of the equinoxes. Over a period of one year, when the Sun returns to the vernal equinox, it is fifty seconds of arc behind its last position, equal to about one degree of arc every seventy-two years. It completes a retrograde circle of the twelve constellations in approximately 26,000 years. This journey in time is known as the Great Year. A cosmic month is approximately 2160 years, the approximate time it takes for the vernal point to move through one constellation. The constellation through which the vernal point is moving has a strong influence over the age and history of the world. In Western astrology, most astrologers use the tropical zodiac which refers to an area of sky named after the constellations. The tropical zodiac is a man made zodiac of twelve equal thirty degree segments. It starts at the vernal equinox where the two great circles, the ecliptic and the celestial equator intersect, and the Sun crosses the vernal equinox at 0 degrees Aries around the 21 March each year.

The first sign of the tropical zodiac (measured by clock time) was fixed, 0 degrees of Aries by Hipparchus (139BC) when the Sun crossed the vernal equinox, 0 degrees of Aries which coincided with the vernal point, sidereal zodiac (measured by star time) 0 degrees of Aries. Since then, and owing to the precession of the equinoxes, the vernal point is now pointing towards 5 degrees of the constellation Pisces and slowly moving backwards (retrograding) towards the constellation Aquarius which is beginning to form the background of stars for the Sun as it crosses the vernal equinox, 0 degrees Aries.

The energy of the world is beginning to change as we approach the dawning of the Age of Aquarius.