[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [Jyotihshastra: Astral and Mathematical Literature](https://indike.org/pramana/ins.science.pingree-1981) › c8.2 # Jyotihshastra: Astral and Mathematical Literature c8.2 Jyotiḥśāstra: Astral and Mathematical Literature c8.2 - **Language:** English ### [c8.2](https://indike.org/pramana/ins.science.pingree-1981.c8.2) To regard the time when the Moon conjoins with a particular nakṣatra as propitious or unpropitious for performing certain acts was an ancient custom in India.¹ We have, indeed, encountered systematic expositions of such systems already in the Śārdūlakarṇāvadāna (pp. 81–99). In the YJ (77–78) actions to be taken on the planetary week-days, when the Moon is in each of the zodiacal signs, in the years ruled by each of the planets, and various other yogas are described. The Gargasamhitā (aṅga 1) prescribes actions to be undertaken when the Moon is in each nakṣatra and in each tithi and karaṇa; see also the BS (97–99) and the Śārdūlakarṇāvadāna (pp. 201–203). - [Previous: c7.s1.27](https://indike.org/pramana/ins.science.pingree-1981.c7.s1.27) - [Next: c8.3](https://indike.org/pramana/ins.science.pingree-1981.c8.3) - [Up: c8](https://indike.org/pramana/ins.science.pingree-1981.c8) ## Linked texts (4) - [Bṛhatsaṃhitā](https://indike.org/pramana/in.astro.samhita.rsi.brhatsamhita) — Varāhamihira, Sanskrit - [Vṛddhayavanajātaka](https://indike.org/pramana/in.astro.hora.yavana.vrddhayavanajataka) — Mīnarāja, Sanskrit - [Śārdūlakarṇāvadāna](https://indike.org/pramana/in.bauddha.sanskrit.avadana.divyavadana.sardulakarnavadana) — Sanskrit - [Vṛddhagārgīyajyotiṣa](https://indike.org/pramana/in.astro.early.vrddhagargiya) — Garga, Sanskrit --- Source: [https://indike.org/pramana/ins.science.pingree-1981.c8.2](https://indike.org/pramana/ins.science.pingree-1981.c8.2) · Pramāṇa