Multiple choice general knowledge history Who calculated the time taken by the earth to orbit the sun??? Aryabhatt Ramanujan Bhaskaracharya Budhayana Reveal answer Fill a bubble to check yourself C Correct answer Explanation Bhaskaracharya (Bhaskara II), the 12th-century Indian mathematician, calculated the time taken by Earth to orbit the Sun as 365.258756484 days in his work Siddhanta Shiromani. This is remarkably close to the modern value of 365.256 days.