The navgraha - Surya, Chandra, mangal, budh, brihaspati, shukra, shani, rahu and ketu with their position and revolution of Sun find a description in the most ancient scriptures of the world the ved and Puraan. The science of astrology began with the knowledge of Indian sages about the universe. The effects of all the graha were studies in detail. The people of the world initially considered earth to be stationary and they assumed that moon and sun revolved around earth. India gave them the knowledge that the sun is stationary and other graha revolve around it.