AYAN M A
1. Ayan m a Controversy • What is ‘ayan m a’? The heliocentric orbits of all planets lie approximately in the same plane as that of earth and hence to an observer on earth all of them apparently traverse a celestial zone extending to a width of about 8 degrees on either side, of the ecliptic. This celestial belt circumscribing out existence is called as the zodiacal circle or R icakra. The measurement of celestial longitudes is made along the ecliptic, which is a great circle of the celestial sphere. The ecliptic and the equator intersect at two points viz. the vernal equinox and the autumnal equinox which respectively mark the entry of Sun into northern and southern hemisphere. The vernal equinox is the conventional reference point for measurement of celestial coordinates, and is generally referred as the first point of Aries. Due to luni-solar forces acting on the axis of earths rotation and the consequent precession of axis the equator shifts parallel to itself keeping its inclination to the ecliptic a constant. As a result the equinoctial points undergo a retrograde motion known as the precession of equinoxes. Modern astronomy and the Western astrology make use of this regressing initial point as their reference while in the formulations of Hindu astrology, zodiac has a fixed initial point of reference that is tied upon to the stellar background. According to convention the Hindu’s Wheel of Time is therefore permanently linked up with the twelve prominent constellations of the background, which divide the zodiac among themselves into 12 signs of 30 degrees each, having distinct characteristic features. These zodiacal signs have been named after the imaginary figures with which the constellations resembled like ' The Ram' , ' The Bull'etc. To accomplish the permanent tie up with the constellations it is therefore necessary to correct the modern astronomical longitudes for the cumulative amount of precession since the days of the original coincidence of the vernal equinox and the initial fixed reference point of Aries. This angle over which the vernal equinox has receded from the Aries 00 is known as the ayan m a. But unfortunately no one knows the time of coincidence of both the tropical (s yana or the receding) zodiac and the (Nirayana or the fixed) sidereal zodiac. There are many different schools of thoughts, and their vociferous advocates... but till date the controversy remains unresolved... If you have a loose brain that defies the commonsense you can have your own ayan m a. The popular viewpoints (a) Citr paksa