Why Does the Zodiac Start with Aries if the Sun is on Pisces on March 21? People are used to express their birthdate associated with a sign of the zodiac. The zodiac represents the 12 constellations of

Axial Precession The axial precession period of a celestial object (in this case Earth) is the movement that the Earth's axis does changing its orientation slowly and progressively, completing a whole

Just as we have the solar (tropical) year of 365.242 days, there is also another longer, less known cycle. It is known as the Great Year. The Great Year is a cycle of 25,772 years and it is based on a