Astrophysicist

Subrahmanyan Chandrasekhar

Born 19 October 1910 · Pakistan — Died 21 August 1995

Formulated the Chandrasekhar limit defining the maximum mass of white dwarf stars.

📖Post-Independence 🏛️Science & Engineering 📍Pakistan 🌐Outside India

Subrahmanyan Chandrasekhar was an Indian-American theoretical physicist. He shared the 1983 Nobel Prize in Physics "for his theoretical studies of the physical processes of importance to the structure and evolution of the stars." His mathematical treatment of stellar evolution yielded many of the current theoretical models of the later evolutionary stages of massive stars. The Chandrasekhar limit describes the maximum mass of a white dwarf. Above it, a stellar remnant will collapse to form a neutron star or black hole.

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A detail that
surprised us

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Chandrasekhar was the nephew of Nobel laureate C.V. Raman, linking two Nobel Prize-winning scientists within one family lineage.

The Story

🌌 In 1930, while traveling from India to England aboard a ship, Chandrasekhar calculated the mass limit beyond which white dwarf stars could not remain stable, a discovery now known as the Chandrasekhar limit (1.44 solar masses).

At the University of Cambridge in the early 1930s, his assertion that stars above this mass would collapse into neutron stars or black holes was met with skepticism and public ridicule by Arthur Eddington, then a leading astronomer.

3🛠️ In 1937, Chandrasekhar moved to the University of Chicago, where he worked for nearly six decades, developing mathematical models explaining stellar structure and evolution, contributing to the foundation of modern astrophysics.

4He spent 27 years living on the grounds of Yerkes Observatory in Wisconsin, a remote location where he balanced intense scientific work with a unique domestic life alongside his wife Lalitha, who attended his lectures.

🏅 Awards & Honours

1983

Nobel Prize in Physics

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Royal Medal

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Bruce Medal

🔍 One thing most people don't know

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In 1935, Chandrasekhar’s theory predicting the existence of black holes was publicly dismissed by Arthur Eddington, delaying acceptance of his ideas for decades.

📸 Through the Years

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🗓️ A Life in Moments

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Birth

Born in Lahore, British Raj

Subrahmanyan Chandrasekhar was born into a Tamil Brahmin family in Lahore, now in Pakistan, where his father was Deputy Auditor General of Northwestern Railways.

1910

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Education

Journey to England sparks key discovery

During his voyage to the University of Cambridge, Chandrasekhar calculated the maximum mass of white dwarf stars, now called the Chandrasekhar limit.

1930

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Career

Joins University of Chicago faculty

Chandrasekhar began his long academic career at the University of Chicago, where he remained until his death.

1937

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Publication

Formulates dynamical friction

He introduced the concept of dynamical friction, explaining how gravitational forces slow stars in clusters.

1943

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Career

Becomes editor of The Astrophysical Journal

Chandrasekhar served as editor for nearly two decades, influencing astrophysics research dissemination.

1952

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Award

Receives Nobel Prize in Physics

He was awarded the Nobel Prize for theoretical studies on stellar evolution, recognizing work begun in the 1930s.

1983

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Death

Passes away in Chicago

Chandrasekhar died at age 84 after a lifetime devoted to astrophysics research and education.

1995

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🗝️Discoveries

Swipe to uncover hidden stories

01 / 04

👤PERSONAL

Chandrasekhar lived on the grounds of Yerkes Observatory in Wisconsin for 27 years, despite its isolated location, to remain close to his research and teaching duties.

University of Chicago archival article

02 / 04

🏆ACHIEVEMENT

He introduced the concept of "dynamical friction" in 1943, a mathematical description of how stars slow down due to gravitational interactions within star clusters.

Wikipedia

03 / 04

🏆ACHIEVEMENT

Chandrasekhar was editor of The Astrophysical Journal from 1952 to 1971, overseeing a pivotal era in astrophysics publication.

Wikipedia

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“The award of a Nobel Prize carries with it so much distinction and the number of competing areas and discoveries are so many, that it must of necessity have a sobering effect on an individual who receives it.”

— Subrahmanyan Chandrasekhar

🎙️ Speeches & Recordings

These recordings preserve the legacy of Bharat's icons

1983 Nobel Laureate in Physics, Subramanyan Chandrasekhar

·YouTube

🌱 What changed because of them

Chandrasekhar’s Chandrasekhar limit redefined astrophysics by identifying the threshold for white dwarf stability, paving the way for the modern understanding of neutron stars and black holes. His tenure at the University of Chicago and editorship at The Astrophysical Journal influenced generations of astrophysicists and solidified the institution as a global hub for stellar research. The Chandra X-Ray Observatory, named in his honor, continues to explore high-energy phenomena in the cosmos, directly extending his legacy.

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