This was also the time when Aryabhata, a mathematician and astronomer, wrote a book in Sanskrit known as the Aryabhatiyam. He stated that day and night were caused by the rotation of the earth on its axis, even though it seems as if the sun is rising and setting everyday. He developed a scientific explanation for eclipses as well. He also found a way of calculating the circumference of a circle, which is nearly as accurate as the formula we use today. Varahamihira, Brahmagupta and Bhaskaracharya were some other mathematicians and astronomers who made several discoveries.

Some of the learners also asked:
What did the book Aryabhatiyam discuss?