Aryabhata, a renowned Indian astronomer and mathematician, is credited with writing the "Surya Siddhanta", a significant astronomical treatise that laid the foundation for Indian astronomy.

The Mahabharata, one of the two major ancient Indian epics, contains extensive descriptions of astronomical phenomena, including celestial bodies, constellations, and planetary movements.

Aryabhata, a prominent Indian astronomer and mathematician, is credited with developing the concept of the "zero" and introducing it to the world. This fundamental concept revolutionized mathematics and astronomy.

The Rigveda, one of the four Vedas, is considered the oldest and most sacred collection of hymns in ancient Indian literature. It contains numerous references to astronomical phenomena and deities associated with celestial bodies.

Brahmagupta, a renowned Indian astronomer and mathematician, formulated the "Brahmagupta identity", a crucial formula in trigonometry that relates the sine and cosine functions.

The Surya Siddhanta, an ancient Indian astronomical treatise, contains detailed descriptions of astronomical instruments and observations, including the use of gnomons and armillary spheres.

Aryabhata, a prominent Indian astronomer and mathematician, is credited with developing the concept of the "sine" function and introducing it to the world. This function plays a crucial role in trigonometry and various mathematical applications.

The Brihat Samhita, an encyclopedic text by Varāhamihira, contains detailed descriptions of the lunar mansions (nakshatras) and their significance in astrology, astronomy, and meteorology.

Bhaskara II, a renowned Indian astronomer and mathematician, formulated the "Bhaskara I identity", a crucial formula in trigonometry that relates the sine and cosine functions.

The Vishnu Purana, one of the eighteen major Puranas in Hindu literature, contains detailed descriptions of celestial bodies, constellations, and planetary movements, providing insights into ancient Indian astronomy.

Aryabhata, a prominent Indian astronomer and mathematician, is credited with developing the concept of the "cosine" function and introducing it to the world. This function plays a crucial role in trigonometry and various mathematical applications.

The Shatapatha Brahmana, a Vedic text, contains detailed descriptions of astronomical phenomena and the role of celestial bodies in religious rituals, providing insights into the astronomical knowledge of ancient India.

Aryabhata, a prominent Indian astronomer and mathematician, formulated the "Aryabhata-Bhaskara identity", a crucial formula in trigonometry that relates the sine and cosine functions.

The Surya Siddhanta, an ancient Indian astronomical treatise, contains detailed descriptions of the precession of the equinoxes and the concept of the Great Year, demonstrating the advanced astronomical knowledge of ancient India.