A History of the Kerala School of Hindu Astronomy (in Perspective) c7.s2.3

c7.s2.3

¹ K. V. Sarma, The Dṛggaṇita of Parameśvara, Cr. ed. with Introduction, Hoshiarpur, 1963. Parameśvara is reputed to have made continuous astronomical observations for 55 years with the help of instruments : Cf. what Nilakaṇṭha Somayājin, who received instruction from Parameśvara, says in his Āryabhaṭīya-bhāṣya (Gola, 43) : *Parameśvarācāryeṇa punaḥ grahaṇagrahayogādikam yantraḥ pañcapañcaśad-varṣakālam samyak parīkṣitam. Aha caivam...“grahendraḥ pañcapañcaśad-varṣakālasaḍaniare”* etc. (Trivandrum Skt. Ser., No. 185, p. 154).