Surya Siddhanta

Description

Surya Siddhanta Surya Siddhanta of Varaha as given in his Pañca Siddhāntikā are almost the same as those of the Khandakhādyaka, it is clear that the old Surya-Siddhanta was made up to date by Varāha by replacing the old constants in it by new ones from Aryabhata. I’s ‘midnight’ system. A subsequent redactor of the Surya-Siddhanta changed the constants as introduced by Varaha by following Brahmagupta’s teachings in his Brahmasphuța Siddhanta and the Uttara Khandakhadyaka.

Surya Siddhanta is the most important of this class of works & some attempt should yet be made to ascertain its true date. From internal evidence alone Burgees came to the conclusion that the superior limit to its date is 490 A.D. and that the lower limit is 1091 A.D. Similarly between the Brahmasphuta Siddhanta and the modern Surya Siddhānta, we believe that we have established our view as to the nature of the modern Sürya- Siddhanta.