Birth in Lahore and education

Subrahmanyan Chandrasekhar was an astrophysicist born in Lahore on 19 October 1910, when the city was in British India. The Chandra X-ray Observatory’s biography records that his family moved to Madras in 1918. He studied physics at Presidency College there and went on to Cambridge for doctoral work. Lahore is now in Pakistan, and this birthplace is a connection to Punjab’s history rather than a claim that his scientific career was centred there. His later research and teaching were based in the United States, including at the University of Chicago’s Yerkes Observatory.[1]

A limit for white dwarfs

Chandrasekhar studied what happens as stars exhaust their nuclear fuel. NASA’s account explains that a white dwarf is a dense stellar remnant and that his calculations showed a limiting mass for such an object. The Chandrasekhar limit is commonly expressed as roughly 1.4 times the mass of the Sun, under the relevant idealised conditions. A star’s full evolution depends on more than a single number, so the limit should not be treated as a prediction that every star above it follows an identical path. His calculations helped connect the physics of matter with the evolution of stars.[2]

Research and recognition

The Royal Swedish Academy of Sciences awarded half of the 1983 Nobel Prize in Physics to Chandrasekhar for theoretical studies of processes important to the structure and evolution of stars. William A. Fowler received the other half for work on nuclear reactions and the formation of elements. The shared prize recognised related but distinct contributions. Chandrasekhar also worked on other problems in theoretical astrophysics and taught generations of students. The award citation identifies the research for which he was honoured; it is not a complete list of his scientific work or a claim that he worked alone throughout his career.[3]

Sources & notes

Source records include access dates and, where known, limits on what was examined. Checks used AI assistance; independent human or specialist review has not been completed.

  1. Chandra X-ray Observatory. Subrahmanyan Chandrasekhar: the man behind the name ↗Written source · Source date: publication date not established · Locator: Career chronology. Accessed 2026-11-03.Written source inspected; underlying interviews not independently reviewed.Return to Birth in Lahore and education, paragraph 1 ↑
  2. NASA Goddard Space Flight Center. White Dwarf Stars ↗Written source · Source date: publication date not established · Locator: White dwarf structure and Chandrasekhar limit; content marked last modified December 2010. Accessed 2026-11-05.NASA’s explanation was rechecked for the approximate limit and white-dwarf structure. The December 2010 content-modification label is not assumed to be the original publication date; later page-footer dates are distinct.Return to A limit for white dwarfs, paragraph 1 ↑
  3. Royal Swedish Academy of Sciences. The 1983 Nobel Prize in Physics: press release ↗Written source · Source date: 1983-10-19 · Locator: Prize citation. Accessed 2026-11-03.Written source inspected; underlying interviews not independently reviewed.Return to Research and recognition, paragraph 1 ↑
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