Which medieval astronomical and mathematical treatise, composed by Nilakantha Somayaji of the Kerala School, introduced radical planetary models predating European heliocentric discoveries?

💡 Solution & Explanation

Tantrasangraha, authored by Nilakantha Somayaji in 1501, is a monumental work of the Kerala School of Astronomy and Mathematics that formulated advanced planetary models where inner planets revolve around the Sun, which in turn revolves around the Earth. Yuktibhasa, written by Jyesthadeva, later provided mathematical proofs for these infinite series and trigonometric expansions. These texts reflect the pinnacle of indigenous scientific inquiry in medieval Kerala.