Tantrasangraha of Nilakantha Somayaji

The Tantrasangraha, composed by the renowned Kerala astronomer Nilakantha Somayaji (c. 1444–1545 AD), ranks along with the Aryabhatiya of Aryabhata and the Siddhantasiromani of Bhaskaracarya as one of the major works which significantly influenced further work on astronomy in India. One of the distinguishing features of this book is the introduction of a major revision of the traditional Indian pl...