Jyotisha-Ganita: Astronomical Mathematics

Learn how Aryabhata's revolutionary ideas about Earth's rotation and the development of sine tables transformed astronomy. Discover the mathematical precision behind the Panchanga calendar system.

Lessons in this chapter

• Jya: The Bowstring That Became Sine — How Indian astronomy invented trigonometry and a mistranslation carried it west
• Aryabhata's Revolution: Earth Rotates, Not the Sky — The rotational insight 1,000 years before Copernicus
• Sine Tables: Computing the Heavens — The computational tools that made Indian astronomy possible
• Varahamihira's Five: Synthesizing World Astronomy — How a 6th-century scholar at Ujjain laid five rival astronomies side by side and built the first comparative science
• Bhaskara's Siddhanta: Mathematical Elegance — The 12th-century masterwork that refined Indian astronomy
• Eclipse Prediction: Mathematics Serving Dharma — How ritual requirements drove accurate eclipse calculation
• Panchanga: The Living Mathematical Calendar — How ancient mathematics continues to guide daily Hindu life

Back to Indian Mathematics: Ancient Genius, Modern Foundations