The Surya Siddhanta is an ancient Indian astronomical text that dates back to around the 4th to 5th century CE. It provides detailed calculations for celestial phenomena, including the movements of the sun, moon, and planets. The text is significant for its mathematical precision and its influence on later Indian astronomy. This work is attributed to the sage Aryabhata and serves as a foundational text for understanding the principles of Indian astronomy. It includes methods for calculating time, eclipses, and the positions of celestial bodies, showcasing the advanced knowledge of ancient Indian scholars in the field of astronomy.