While the Europeans were still debating whether the earth was flat or not, the Vedic sages had already figured out the effects of the earth’s wobble on the calculations of the zodiac. It is quite amazing how advanced the Vedic civilization was in mathematics, science and astronomy that even without the aid of modern technologies they had calculated that the orientation of the equinoxes to the fixed stars precedes or moves backward through the zodiac at the rate of about 50.3 seconds per year or about 1 degree every 70 years (and it adds to about 24 degree over 2000 years).