Two thousand years before Pythagoras, philosophers in northern India had understood that gravitation held the solar system together, and that therefore the sun, the most massive object, had to be at its center.

Teresi, Dick Lost Discoveries: The Ancient Roots of Modern Science - from the Babylonians to the Maya Simon & Schuster New York 2002 p. 1- 8 and 159 and 174 -239 as quoted in Londhe, S. (2008). A tribute to Hinduism: Thoughts and wisdom spanning continents and time about India and her culture