The 2 intersection points at which
Celestial Equator cuts the Ecliptic in an angle of 23 1/2˚ degrees are called
"Equinoxes" (or) " Equinoctial Points ". Day and Night are
equal on these 2 days (points) in the Year.
- Ecliptic is fixed, the Equator is only one that is Moving.
There are 2 more points
called " Solstices " [Ayanatas].
One such point Northernmost latitude (Hemisphere) of Sun's apparant path [Where it reaches Highest] known as " Summer Solstice " (or) "Uttarayana" dawn approximately on 21st June.
One such point Northernmost latitude (Hemisphere) of Sun's apparant path [Where it reaches Highest] known as " Summer Solstice " (or) "Uttarayana" dawn approximately on 21st June.
And anthor known as " Winter
Solstice " (or) "Dakshinayana" where Sun reaches Lowest point of
Southern Hemisphere dusk approximately on 22nd Dec..
The Vernal Equinox was found to precede
1˚ degree in every 72 Years i.e 50.24 Seconds Backwards per Year.
Thus the intersectin point of the
ecliptic changes on the celestial equator. Due to this, there is shift in
Solstice which is called " Vishu Chalanam" [Precession of Equinox].
In other way, The position of any fixed star near the ecliptic and near
the border line of the Constellation Aries could be chosen to be the
determinant, or standard reference point, in order to observe this yearly
precession of the Vernal Equinoctial Point among the fixed stars. The Hindu
astronomers selected Revati as the determinant fixed star, and considered this
star as marking Aries O° of the constellations. Each year the equinoctial point
of Aries O° of the signs will be found to have precessed some 50" of space
farther west of Revati than it was the previous year.
The meaning of the term, "Precession of the
Equinoxes," is now clear. It refers to the slight annual increase in
distance of the equinoctial points from a standard fixed star, which is
considered as Aries O° in the Zodiac of the Constellations, while the Vernal
Equinox is considered as Aries O° in the Zodiac of the Signs.
1 Age Cycle = 72 Y (equinox Point) * 30˚ (one Zodiac
Sign length) = 2160Yrs.
A
Precession Cycle = 72 Y * 360˚ = 25920 Years.
- We are at the
moment of Piscean Age will enter into Aquarian Age on 2444 A.D.
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