Aryabhata is widely regarded as the father of Indian astronomy due to his significant contributions to the field.

Aryabhata was the first astronomer to propose the heliocentric model of the solar system, where the Earth and other planets revolve around the Sun.

Aryabhatiya is the astronomical treatise written by Aryabhata, which contains his significant contributions to astronomy and mathematics.

Brahmagupta developed the concept of zero and the decimal system, which had a profound impact on mathematics and astronomy.

Brahmasphutasiddhanta is the astronomical treatise written by Brahmagupta, which contains his significant contributions to astronomy and mathematics.

Bhaskara II wrote the astronomical treatise 'Lilavati', which focuses on arithmetic and geometry.

Pancasiddhantika is the astronomical treatise written by Varahamihira, which contains his observations and theories on astronomy.

Aryabhata developed the trigonometric functions sine and cosine, which are essential in trigonometry and astronomy.

Jantar Mantar is the astronomical observatory built by Maharaja Jai Singh II, which consists of several instruments for astronomical observations.

The author of 'Surya Siddhanta' is unknown, but it is considered to be one of the most important astronomical treatises in ancient India.

Yuktibhasa is the astronomical treatise written by Madhava of Sangamagrama, which contains his contributions to astronomy and mathematics.

Aryabhata developed the concept of the 'mean motion of the Sun', which is the average daily motion of the Sun along the ecliptic.

Tantrasangraha is the astronomical treatise written by Nilakantha Somayaji, which contains his contributions to astronomy and mathematics.

Aryabhata developed the concept of the 'precession of the equinoxes', which is the gradual shift in the position of the equinoxes over time.

Brihat Samhita is the astronomical treatise written by Varahamihira, which contains his observations and theories on astronomy, astrology, and other related topics.