Aryabhata was one of the first Indian mathematician and astronomers belonging to the classical age. He was born in 476 BC in Tarenaga, a town in Bihar, India. It is however certain that he traveled to Kusumapara for studies and even resided there for some time. It is mentioned in a few places that Aryabhata was the head of the educational institute in Kusumapara. The University of Nalanda had an observatory in its premises so it is theorized that Aryabhata was the principal of the university as well. On the other hand some other commentaries mention that he belonged to Kerala.
Aryabhata correctly insisted that the earth rotates about its axis daily, and that the apparent movement of the stars is a relative motion caused by the rotation of the earth, contrary to the then-prevailing view, that the sky rotated. This is specified in the first chapter of the Aryabhatiya, where he gives the number of rotations of the earth in a yuga,and made more explicit in his gola chapter: