Nilesh Nilkanth Oak

Biography

Nilesh Nilkanth Oak is an archaeoastronomer whose work has fundamentally reshaped the debate around ancient Indian chronology. A former technology professional, Oak turned to full-time research after recognizing that Sanskrit epics contain hundreds of precise astronomical observations that can be tested against the known mechanics of the solar system. His method is straightforward in principle and demanding in execution: extract every astronomical reference from a text, simulate the sky for candidate dates using planetarium software, and identify the date that satisfies the maximum number of observations simultaneously. His first book, When Did the Mahabharata War Happen? (2011), tested 215+ observations and proposed 5561 BCE — anchored by the Arundhati-Vasishtha observation, which mathematically eliminates all dates after 4508 BCE. The Historic Rama (2014) extended the method to the Valmiki Ramayana, testing 345+ references and proposing 12,209 BCE. Bhishma Nirvana (2018) added 300+ observations from the Bhishma Parva alone. His most recent work, Sugriva's Atlas (2024), analyzes 600+ geographic and astronomical observations from the Kishkindha Kanda, mapping Sugriva's search instructions onto real-world geography spanning from South America to the Alps. Oak's work is distinguished by its falsifiability: every claimed date can be checked by anyone with planetarium software. Critics who engage with the method must contend with the cumulative weight of hundreds of simultaneous observations rather than cherry-picking individual references. His collaboration with Rupa Bhaty on the Surya Siddhanta has extended the approach to India's oldest astronomical text.

Methodology

Extracts 200+ astronomical references from Sanskrit texts, simulates them in Voyager 4.5 / Stellarium, applies multi-constraint falsification.

Key Claims

• 1Mahabharata war: 5561 BCE (215+ observations)
• 2Ramayana war: 12,209 BCE (345+ observations)
• 3Rigveda oldest mandalas: 22,000+ years ago
• 4Arundhati-Vasishtha observation eliminates all post-4508 BCE dates

Major Works

• •When Did the Mahabharata War Happen? (2011)
• •The Historic Rama (2014)
• •Bhishma Nirvana (2018)
• •Sugriva's Atlas (2024)