Aryabhata was an ancient Indian astronomer and mathematician who lived in the 5th century CE. He is known for his contributions to the field of astronomy, including the development of a heliocentric model of the solar system and the calculation of the Earth's circumference.

The armillary sphere is an ancient Indian astronomical instrument used to measure the positions of celestial bodies. It consists of a series of concentric rings that represent the celestial sphere and the positions of the Sun, Moon, and stars.

Bhaskara II was an Indian astronomer and mathematician who lived in the 12th century CE. He developed a theory of planetary motion that was later adopted by European astronomers. His work also included the development of a method for calculating the positions of the Sun and Moon.

The Jantar Mantar is an Indian astronomical observatory that was built in the 18th century. It consists of a series of architectural structures that were used to study the positions of celestial bodies and to make astronomical calculations.

Meghnad Saha was an Indian astronomer and astrophysicist who lived in the 20th century. He is known for his work on the study of galaxies, including the development of a theory of stellar evolution and the calculation of the mass of the Milky Way galaxy.

The Aditya-L1 is an Indian satellite that was launched in 2017 to study the Sun. It is the first Indian satellite to be placed in a halo orbit around the Sun, and it will provide valuable data on the Sun's atmosphere, corona, and solar wind.

Subrahmanyan Chandrasekhar was an Indian astronomer and astrophysicist who lived in the 20th century. He is known for his work on the study of black holes, including the development of a theory of the Chandrasekhar limit, which determines the maximum mass of a white dwarf star.

The Himalayan Chandra Telescope is an Indian astronomical observatory that is located in the Himalayas. It is the highest altitude astronomical observatory in the world, and it is used to study a variety of astronomical phenomena, including the cosmic microwave background radiation and the formation of galaxies.

Govind Swarup was an Indian astronomer and radio astronomer who lived in the 20th century. He is known for his work on the study of pulsars, including the discovery of the first pulsar in 1967.

The EOS-01 is an Indian satellite that was launched in 2019 to study the Earth's atmosphere. It is the first Indian satellite to be placed in a geostationary orbit, and it will provide valuable data on the Earth's weather, climate, and air quality.

Homi J. Bhabha was an Indian nuclear physicist and cosmic ray physicist who lived in the 20th century. He is known for his work on the study of cosmic rays, including the development of a theory of the origin of cosmic rays.

The MRT Observatory is an Indian astronomical observatory that is located in the Thar Desert. It is the largest radio telescope in India, and it is used to study a variety of astronomical phenomena, including the cosmic microwave background radiation and the formation of galaxies.

B. S. Sathyaprakash is an Indian astrophysicist who is known for his work on the study of gravitational waves. He is one of the leading scientists in the field of gravitational wave astronomy, and he has made significant contributions to the development of gravitational wave detectors.

The Aditya-L2 is an Indian satellite that was launched in 2022 to study the Sun's corona. It is the second Indian satellite to be placed in a halo orbit around the Sun, and it will provide valuable data on the Sun's atmosphere, corona, and solar wind.

Abhijit Chakraborty is an Indian astronomer who is known for his work on the study of exoplanets. He is one of the leading scientists in the field of exoplanet research, and he has made significant contributions to the discovery and characterization of exoplanets.