Aryabhata is widely regarded as the father of Indian astronomy for his significant contributions to the field. He lived in the 5th century CE and made advancements in mathematics, astronomy, and physics.

Aryabhata proposed the heliocentric model of the solar system, where the Sun is at the center and the planets revolve around it. This model was later refined by Nicolaus Copernicus in the 16th century.

Jantar Mantar is an ancient Indian observatory built by Maharaja Jai Singh II in the 18th century. It consists of a collection of architectural astronomical instruments used for observing the movement of celestial bodies.

Brahmagupta developed the concept of zero and introduced it into the Indian number system. He also made significant contributions to algebra and astronomy.

Varahamihira wrote the astronomical treatise 'Surya Siddhanta', which is considered one of the most important works in Indian astronomy. It contains information on astronomy, astrology, and mathematics.

Bhaskara II calculated the value of pi to four decimal places, which was a remarkable achievement for his time.

The Indian Space Research Organization (ISRO) is the national space agency of India. It is responsible for India's space program and has made significant contributions to space exploration and technology.

Aryabhata was the first Indian satellite launched in 1975. It was placed in orbit around the Sun and became the first satellite to be placed in orbit around the Sun.

Chandrayaan-1 was the first Indian lunar mission that successfully reached the Moon's surface in 2008. It carried out several experiments and sent back valuable data and images.

Mangalyaan was the first Indian mission to study the planet Mars. It was launched in 2013 and successfully entered Mars' orbit in 2014.

Gaganyaan is the Indian human spaceflight program. It aims to send Indian astronauts into space and establish a human spaceflight capability for India.

Varahamihira made significant contributions to the study of comets and developed a theory of comet tails. He also wrote extensively about astronomy and astrology.

Bhaskara II is known for his work on planetary motion and developed a model to explain the retrograde motion of planets. He also made significant contributions to mathematics and astronomy.

Varahamihira compiled a catalog of stars and constellations and provided detailed descriptions of each. He also wrote extensively about astronomy and astrology.

Brahmagupta is known for his work on eclipses and developed methods for predicting solar and lunar eclipses. He also made significant contributions to mathematics and astronomy.