Raja Rammohan Roy was a prominent social reformer and intellectual who also made significant contributions to the field of astronomy. He translated works of European astronomers into Bengali and wrote extensively on astronomy and mathematics.

Meghnad Saha was an eminent Indian astrophysicist who received a doctorate in astronomy from the University of Calcutta in 1917. He is known for his work on stellar atmospheres and the Saha ionization equation.

Vikram Sarabhai was a renowned Indian physicist and astronomer who played a pivotal role in the establishment of the Indian Institute of Astrophysics (IIA) in 1971. He served as the first director of the institute.

The Giant Metrewave Radio Telescope (GMRT) is the largest radio telescope in India and one of the largest in the world. It is located near Pune, Maharashtra, and consists of 30 fully steerable parabolic radio telescopes.

The Indian Space Research Organization (ISRO) is the national space agency of India. It is responsible for the country's space program, including the development and launch of satellites, rockets, and spacecraft.

Aryabhata was the first Indian satellite to be launched into orbit. It was launched on April 19, 1975, from the Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh.

Rakesh Sharma was the first Indian astronaut to travel into space. He flew aboard the Soviet spacecraft Soyuz T-11 in 1984 and spent 7 days and 21 hours in space.

Kalpana Chawla was the first Indian woman astronaut to travel into space. She flew aboard the Space Shuttle Columbia in 1997 and 2003.

Mangalyaan, also known as the Mars Orbiter Mission, was India's first interplanetary mission. It was launched in 2013 and successfully entered Mars' orbit in 2014. The mission studied the Martian atmosphere and surface.

Chandrayaan-2 was India's second lunar mission. It was launched in 2019 and successfully landed a spacecraft, Vikram, on the lunar surface. However, the lander lost communication with the ground shortly after landing.

Abhas Mitra was an Indian astronomer who discovered the first extrasolar planet, PSR 1257+12, in 1992. This discovery marked a significant milestone in the field of astronomy.

The Aryabhata Research Institute of Observational Sciences (ARIES) is an Indian astronomical observatory located in the Himalayas. It is situated at an altitude of 4,500 meters above sea level and is known for its excellent observing conditions.

Subrahmanyan Chandrasekhar was an Indian astrophysicist who made significant contributions to the study of black holes and gravitational waves. He was awarded the Nobel Prize in Physics in 1983 for his work on the theory of the structure and evolution of stars.

Aditya-L1 is an Indian space mission that aims to study the Sun's corona. It is scheduled to be launched in 2023 and will be placed in a halo orbit around the Sun's Lagrange point 1 (L1).

Jayant Narlikar is an Indian astronomer who played a key role in the development of the Unified Luminosity Function (ULF) for galaxies. The ULF is a mathematical model that describes the distribution of galaxies in the universe.