astronomy References Further reading K. V. Sarma (2008) "Nilakantha Somayaji", Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures (2nd edition) edited by Helaine Selin, Springer, . External links Official Website of Chenthala Vishnu Temple Tantrasamgraha Official Website Official Website of Kelallur Nilakantha Somayaji 1444 births 1544 deaths Indian Hindus 16th-century Indian astronomers Kerala school of astronomy and mathematics 15th-century Indian mathematicians 16th-century Indian mathematicians People from Malappuram district Scientists from Kerala 15th-century Indian astronomers Scholars from Kerala