Jyotiṣa: Astronomy That Mapped the Heavens

Explore how Indian astronomers calculated Earth's rotation, predicted eclipses with remarkable accuracy, and developed sophisticated planetary models. Learn about Āryabhaṭa's revolutionary insights and the living tradition of astronomical almanacs.

Lessons in this chapter

• Bhūbhramaṇa: Āryabhaṭa's Rotating Earth — Earth's rotation discovered a millennium before Copernicus
• Grahaṇa: Eclipse Prediction Science — How prediction accuracy surpassed contemporary civilizations
• Graha Gaṇita: Planetary Period Calculations — Sidereal year accuracy to 4 decimal places
• Nakṣatra: The 27-Star Coordinate System — Lunar mansions as celestial coordinates and calendar foundations
• Siddhānta: Astronomical Schools and Texts — The five schools documented by Varāhamihira and their cross-cultural synthesis
• Yantras: Astronomical Instruments — From the gnomon to Jantar Mantar: precision without telescopes
• Pancanga: The Living Astronomical Tradition — Traditional almanac calculations as a bridge between ancient science and living practice

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