Meghnad Saha is widely regarded as the father of modern Indian astronomy. He made significant contributions to the field of astrophysics, including the development of the Saha ionization equation.

Subrahmanyan Chandrasekhar, an Indian-American astrophysicist, played a key role in the discovery of the Chandra X-ray Observatory. He was awarded the Nobel Prize in Physics in 1983 for his contributions to the theory of stellar evolution.

The Himalayan Chandra Telescope is the largest optical telescope in India. It is located at an altitude of 4,500 meters in the Himalayas and has a mirror diameter of 2.0 meters.

Jayant Narlikar is an Indian astrophysicist and cosmologist who has made significant contributions to the study of the origin and evolution of galaxies. He is known for his work on the Hoyle-Narlikar theory of gravity.

The Indian Space Research Organisation (ISRO) is the national space agency of India. It is responsible for the development and implementation of India's space program.

Subrahmanyan Chandrasekhar, an Indian-American astrophysicist, made significant contributions to the theory of black holes. He was awarded the Nobel Prize in Physics in 1983 for his work on the theory of stellar evolution, which includes the study of black holes.

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.

Govind Swarup, an Indian radio astronomer, is known for his work on the pulsars. He was the director of the Giant Metrewave Radio Telescope (GMRT) and made significant contributions to the study of pulsars.

Mangalyaan is an Indian satellite that was launched in 2014 to study the Mars. It is the first Indian satellite to be sent to another planet.

Harinder Singh Bedi, an Indian astrophysicist, is known for his work on the cosmic microwave background. He was the director of the Aryabhata Research Institute of Observational Sciences (ARIES) and made significant contributions to the study of the cosmic microwave background.

Chandrayaan-1 is an Indian satellite that was launched in 2008 to study the Moon. It was the first Indian satellite to be sent to the Moon.

Jayant Narlikar, an Indian astrophysicist and cosmologist, is known for his work on the gravitational waves. He was the director of the Inter-University Centre for Astronomy and Astrophysics (IUCAA) and made significant contributions to the study of gravitational waves.

Saral is an Indian satellite that was launched in 2013 to study the Earth's atmosphere. It is the first Indian satellite to be dedicated to the study of the atmosphere.

Jayant Narlikar, an Indian astrophysicist and cosmologist, is known for his work on the extragalactic astronomy. He was the director of the Inter-University Centre for Astronomy and Astrophysics (IUCAA) and made significant contributions to the study of extragalactic astronomy.

Saral is an Indian satellite that was launched in 2016 to study the ocean. It is the first Indian satellite to be dedicated to the study of the ocean.