He is credited as the first astronomer to make an attempt at measuring the Earth's circumference since Eratosthenes (circa 200 BC). Aryabhata accurately calculated the Earth's circumference as 24,835 miles, which was only 0.2% smaller than the actual value of 24,902 miles. Aryabhatta was the first to prepare the Indian Almanac, better known as panchangam.
Astronomer Aryabhata is credited with being the pioneer in measuring the Earth's circumference since Eratosthenes (circa 200 BC). He accurately calculated the Earth's circumference at 24,835 miles, which was only 0.2% less than the actual value of 24,902 miles. Aryabhatta also laid the groundwork for creating the Indian Almanac, also known as panchangam.