Aryabhata and the earth's circumference

Aryabhata was an influential Indian mathematician and astronomer from the 5th century. He made significant advancements, including approximations for Earth's circumference and calculations of planetary positions. Aryabhata estimated Earth's diameter or circumference with remarkable accuracy for his time, recognizing it as spherical and calculating measurements that closely match modern values. His work laid foundational principles for astronomy and mathematics, demonstrating that Earth's shape can be understood through careful observation and reasoning, long before modern technology confirmed these facts.