Summary
Highlights
Nilesh Oak introduces his talk on ancient updates to Surya Siddhanta, a highly respected astronomical text. He highlights that while modern indologists date the text to around 580 CE based on recalculations of nakshatra longitudes, his research on Ramayana and Mahabharata indicates a much older timeline, specifically going back to 12,209 BCE for Ramayana. He questions the origins of Surya Siddhanta, noting its mention of Mayasur as the recipient of knowledge from Surya.
A crucial reference in Surya Siddhanta states the existence of two pole stars: one in the north and one in the south. Oak explains that due to the Earth's axial precession, the pole star changes over millennia. While today we have Polaris in the north and no distinct bright star in the south, ancient times could have had different configurations. He cites 12,000 BCE as a period when two bright stars, Vega (Abhijit) in the north and Agastya in the south, served as pole stars simultaneously.
The second and third pieces of evidence from Surya Siddhanta are the Earth's obliquity and the positions of periapsis (closest to the sun) and apoapsis (farthest from the sun) relative to seasons. Surya Siddhanta states the obliquity as 24 degrees, which differs from today's 23.4 degrees. This seemingly small difference led 19th-century scholars like Burgess to dismiss the text's accuracy. However, obliquity changes over roughly 41,000 years, reaching 24 degrees at various points in the past. Additionally, the text describes the peak of Hemanta (winter) at apoapsis and the peak of Grishma (summer) at periapsis.
Oak synthesizes the three pieces of evidence: the presence of two pole stars, an Earth obliquity of 24 degrees, and the specific seasonal alignment with apoapsis and periapsis. When these conditions are astronomically simulated using modern data, the only time they all align precisely is around 12,000 BCE (with a margin of +/- 50 years). This specific combination is presented as unique over hundreds of thousands of years, strongly suggesting that the astronomical observations recorded in Surya Siddhanta date back to this period.
Oak explains that Surya Siddhanta is a living text that has been updated over time, accounting for different historical datings. He references other researchers' findings, including Dr. Anil Narayna's work suggesting a 7500 BCE dating for nakshatra latitudes and John Playfair's work on the sun's equation, which points to 5300 BCE as the period of its highest accuracy. He also mentions the removal of Abhijit (Vega) from the list of stars, which is alluded to in Surya Siddhanta and explained in the Mahabharata as happening around 14,500 BCE. These multiple datings imply a continuous process of updating and modifying the text over millennia, reflecting changing astronomical observations.
He places these astronomical findings within a broader context of ancient Indian civilization, correlating them with geological and hydrological data concerning the Saraswati River, which flowed from 90,000 BCE until its end around 22,000 BCE. He also refers to the dating of Ramayana, Mahabharata and Rig Veda to similarly ancient periods, suggesting a continuous and evolving civilization that incorporated new knowledge into its texts. The idea is to demonstrate that the 14,500-year timeline for Surya Siddhanta aligns with other scientific evidence for ancient Indian civilization.