The Chakra Yantra is used to find out the right ascension an

Cakra yantra - wheel or circle 4 Yaṣṭi yantra- apole or staff instrument 5 Śaṅku yantra- Gnomon 6 Ghaṭikā yantra

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kolapani yantra yasti-yantra These tools allowed for precise measurements of celestial positions and the tracking of stars

jackpot yantra Cakra yantra - wheel or circle 4 Yaṣṭi yantra- apole or staff instrument 5 Śaṅku yantra- Gnomon 6 Ghaṭikā yantra