S. Chandrashekhar
In 1931, the astrophysicist Subrahmanyan Chandrasekhar theorised that a star would not form a stable white dwarf at the end of its life if its mass was greater than 1.44 times the solar mass (1.44 Ms). This is known as the Chandrasekhar limit, above which the white dwarf will explode as what is called a “Type 1a supernova”. This work fetched Chandrasekhar the Nobel Prize in 1983. His work led to current theory of Black Hole. A black hole is a region of space time from which gravity prevents anything, including light, from escaping. The hole is called “black” because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics In 1931, Subrahmanyan Chandrasekhar calculated, using special relativity, that a non-rotating body of electron-degenerate matter above a certain limiting mass (now called the Chandrasekhar limit at 1.4 solar masses) has no stable solutions.