[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [A History of the Kerala School of Hindu Astronomy (in Perspective)](https://indike.org/pramana/ins.science.sarma-1972) › c8.s7.1 # A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s7.1 A History of the Kerala School of Hindu Astronomy (in Perspective) c8.s7.1 - **Language:** English ### [c8.s7.1](https://indike.org/pramana/ins.science.sarma-1972.c8.s7.1) In the context of the continuity of astronomical tradition and the diligence with which its traditional exponents cultivated its study, a reference might be made here to certain other significant methodologies evolved and discoveries made by Kerala astronomers and mathematicians. The introduction of the \*Kaṭapayādi\* notation and the expression of astronomical data through mnemonic tables and verses composed with the help of this facile notation has already been noticed. In his table of sine-differences enumerated in the verse \*makhi-bhakhi\* etc. (\*Gītika\* 10), \*Āryabhaṭa\* gives only their rough values, correct to the minute. It is interesting that Govindasvāmin (\*c.\* 800-50) developed their evaluation still more accurately, correct to the second order of sexagesimal fractions, viz., seconds and thirds, which he gives in his \*Bhāṣya\* on \*Mahabhāskarīya\*. He also gives a formula for the derivation of the value of the last sine-difference when the tabular interval is halved. Developing the topic further, he enunciates also a rule for computing, from a given last sine-difference, the other sine-differences lying between 60° and 90°.¹ - [Previous: c8.s6.60](https://indike.org/pramana/ins.science.sarma-1972.c8.s6.60) - [Next: c8.s7.2](https://indike.org/pramana/ins.science.sarma-1972.c8.s7.2) - [Up: c8.s7](https://indike.org/pramana/ins.science.sarma-1972.c8.s7) ## Linked texts (1) - [Āryabhaṭīya](https://indike.org/pramana/in.astro.siddhanta.early.aryabhatiya) — Āryabhaṭa, Sanskrit --- Source: [https://indike.org/pramana/ins.science.sarma-1972.c8.s7.1](https://indike.org/pramana/ins.science.sarma-1972.c8.s7.1) · Pramāṇa