Subrahmanyan Chandrasekhar was an Indian-American astrophysicist who made significant contributions to the study of black holes and gravitational waves. He is best known for his work on the Chandrasekhar limit, which describes the maximum mass of a white dwarf star before it collapses under its own gravity to form a black hole.

The Vainu Bappu Observatory is an astronomical observatory located in Kavalur, Tamil Nadu, India. It is named after the Indian astronomer Vainu Bappu, who played a significant role in the development of astronomy in India.

Meghnad Saha was an Indian astrophysicist who made significant contributions to the study of stellar evolution and the development of the Saha equation. The Saha equation describes the ionization of atoms in a gas, and it has been used to explain the spectra of stars and other astronomical objects.

The Giant Metrewave Radio Telescope is a radio telescope located in Pune, Maharashtra, India. It is one of the largest radio telescopes in the world, and it is used to study a wide range of astronomical objects, including galaxies, quasars, and pulsars.

Subrahmanyan Chandrasekhar was an Indian-American astrophysicist who made significant contributions to the study of cosmic rays and the development of the Chandrasekhar limit. The Chandrasekhar limit describes the maximum mass of a white dwarf star before it collapses under its own gravity to form a black hole.

The Aryabhatta Research Institute of Observational Sciences is a research institute located in Nainital, Uttarakhand, India, that is dedicated to the study of astrophysics and astronomy. It is named after the Indian astronomer Aryabhata, who made significant contributions to the development of astronomy in India.

Subrahmanyan Chandrasekhar was an Indian-American astrophysicist who made significant contributions to the study of general relativity and the development of the Schwarzschild metric. The Schwarzschild metric describes the gravitational field of a spherically symmetric mass, and it is used to study black holes and other compact objects.

The Tata Institute of Fundamental Research is a research institute located in Mumbai, Maharashtra, India, that is dedicated to the study of fundamental physics and mathematics. It is one of the leading research institutes in India, and it has made significant contributions to the development of astronomy and other fields of science.

Satyendra Nath Bose was an Indian physicist who made significant contributions to the study of quantum mechanics and the development of the Bose-Einstein statistics. The Bose-Einstein statistics describes the behavior of bosons, which are particles that can occupy the same quantum state.

The Indian Astronomical Observatory is an astronomical observatory located in Hanle, Ladakh, India, that is dedicated to the study of gamma rays. It is one of the highest altitude observatories in the world, and it is used to study a wide range of astronomical objects, including active galactic nuclei, supernova remnants, and pulsars.

Ejnar Hertzsprung was a Danish astronomer who made significant contributions to the study of stellar evolution and the development of the Hertzsprung-Russell diagram. The Hertzsprung-Russell diagram is a plot of the luminosity of stars against their surface temperature, and it is used to study the evolution of stars.

The Ooty Radio Telescope is a radio telescope located in Ooty, Tamil Nadu, India, that is used to study the cosmic microwave background. The cosmic microwave background is the remnant radiation from the Big Bang, and it is used to study the early universe.

Roy Kerr was a New Zealand mathematician who made significant contributions to the study of general relativity and the development of the Kerr metric. The Kerr metric describes the gravitational field of a rotating black hole, and it is used to study the behavior of matter and energy in the vicinity of black holes.

The Devasthal Optical Telescope is an astronomical observatory located in Devasthal, Uttarakhand, India, that is dedicated to the study of optical astronomy. It is one of the largest optical telescopes in India, and it is used to study a wide range of astronomical objects, including galaxies, stars, and planets.

Kenneth Greisen was an American physicist who made significant contributions to the study of cosmic rays and the development of the Greisen-Zatsepin-Kuzmin limit. The Greisen-Zatsepin-Kuzmin limit is the maximum energy that cosmic rays can reach before they are absorbed by the cosmic microwave background.