The detailed article “Jyothisha – the eye of the “Veda Purursha” can be read and downloaded from http://www.scribd.com/doc/22718504/Jyothisha-Eye-of-the-Veda-Purusha
"Jyothisha means "Knowledge of Light". The source of Light that increases our intellect is none other than the Supreme God who is mediated upon in the Gayatri mantram.
That God is Savitur, the Sun.
The Supreme God who is seen as the Source of Light permeates all the three worlds of Prithvi (earth), Antahriksham (atmosphere) and Dyaur loka (celestial sphere) with his thousand crores of rays. The Light of this deity (Bhargo devasya) is meditated upon so that He will guide us in the right direction.
The mechanism of how this deity of the Sun guides Creation, Sustenance and Destruction in these three worlds is understood from the Eye of Veda Purusha, the Jyothisha Sastra....'
To continue to read this article of mine -
"Jyothisha -The Eye of the Veda Purusha "
please click the following link in the Astrological Magazine, Nov-2009 issue