Aryabhata is considered the father of Indian mathematics due to his significant contributions to the field, including the development of the decimal system and the concept of zero.

Brahmagupta developed the Fibonacci sequence, also known as the golden ratio, and used it in his work on mathematics and astronomy.

Jantar Mantar is a collection of astronomical observatories built by Maharaja Jai Singh II in the 16th century. It consists of five observatories located in Delhi, Jaipur, Ujjain, Varanasi, and Mathura.

Aryabhata proposed the heliocentric model of the solar system, which places the Sun at the center and the Earth and other planets revolving around it.

The Hindu calendar, also known as the Panchang, is a lunisolar calendar that is still used in India and other parts of South Asia.

Brahmagupta developed the concept of negative numbers and used them in his mathematical calculations.

The astrolabe is an astronomical instrument used to measure the altitude of celestial objects above the horizon.

Aryabhata developed the concept of the sine function and used it in his astronomical calculations.

Brihat Samhita is an astronomical treatise written by Varahamihira in the 6th century. It covers various topics such as astronomy, astrology, and meteorology.

Bhaskara II developed the concept of the cosine function and used it in his astronomical calculations.

Ujjain Observatory was built in the 5th century and was one of the most important astronomical observatories in ancient India.

Bhaskara II developed the concept of the tangent function and used it in his astronomical calculations.

Aryabhatiya is an astronomical treatise written by Aryabhata in the 5th century. It covers various topics such as astronomy, mathematics, and astrology.

Bhaskara II developed the concept of the secant function and used it in his astronomical calculations.

Pancha Siddhantika is an astronomical treatise written by Brahmagupta in the 7th century. It covers various topics such as astronomy, mathematics, and astrology.