Subrahmanyan Chandrasekhar was the first Indian astrophysicist to propose the existence of black holes in 1930.

Cygnus X-1 was the first black hole discovered by Indian astronomers in 1971.

Aryabhata was the first Indian satellite used to study black holes in 1975.

Subrahmanyan Chandrasekhar developed the theory of gravitational collapse, which explains how a star can collapse under its own gravity to form a black hole.

Subrahmanyan Chandrasekhar was the first to propose the idea of a black hole singularity, which is a point of infinite density and gravity at the center of a black hole.

Subrahmanyan Chandrasekhar developed the theory of black hole evaporation, which explains how black holes can lose mass and eventually evaporate.

Vikram Sarabhai was the first to observe the X-ray emission from a black hole in 1962.

Subrahmanyan Chandrasekhar developed the theory of black hole accretion disks, which explains how matter can spiral into a black hole and release energy.

Subrahmanyan Chandrasekhar was the first to propose the idea of a black hole binary system, which is a system of two black holes orbiting each other.

Subrahmanyan Chandrasekhar developed the theory of black hole mergers, which explains how two black holes can merge to form a single black hole.

No Indian astronomer was the first to observe the gravitational waves from a black hole merger.

Abhay Ashtekar is an Indian astrophysicist who is currently working on the theory of black hole quantum gravity.

Amitabha Ghosh was the first to propose the idea of a black hole firewall in 2013.

Tanmoy Bhattacharya is an Indian astrophysicist who is currently working on the theory of black hole thermodynamics.

Arvind Paranjpye was the first to propose the idea of a black hole information paradox in 1974.