The Surya Siddhanta, A textbook on astronomy of ancient India, last compiled in 1000 BC, believed to be handed down from 3000 BC by aid of complex mnemonic recital methods still known today. Showed the Earth's diameter to be 7,840 miles, compared to modern measurements of 7,926.7 miles. Showed the distance between the Earth and the Moon as 253,000 miles, Compared to modern measurements of 252,710 miles.RigVedas (1.50), a hymn addressed to the Sun, refers quite clearly that the Sun traverses 2,202 yojanas in half a nimesha. This, in fact, refers to the speed of light.
I forgot about this from the Rig Veda above. They knew about the speed of light and it's verified in this ancient text. It has since been confirmed that that very hymn means exactly that.
When you study India's ancient ancestors' writings about how India knew so much detail on the devastation rocket type weaponry have on land/humans/animals and about flying vehicles and battles, it's no surprise how they came to learn/know things about traveling "beneath the moon and above the clouds" as one ancient Indian verse states.
I wonder where this knowledge of the stars, space flight, speed of light, etc...came from.http://www.indiastar.com/kak4.htm