Subrahmanyan Chandrasekhar (1910–1995) was an Indian-American astrophysicist known for his groundbreaking work on stellar structure and the evolution of stars. He made significant contributions to our understanding of white dwarf stars, neutron stars, and black holes. Chandrasekhar’s most famous work is his theory of white dwarf stars, which predicts a maximum mass limit (known as the Chandrasekhar limit) beyond which a white dwarf star will undergo gravitational collapse and form a neutron star or black hole. For his contributions to astrophysics, Chandrasekhar was awarded the Nobel Prize in Physics in 1983.