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Georges Lemaître

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1894 – 1966 · Cosmology, Astrophysics, Mathematics
Belgian Catholic priest and cosmologist who first proposed the theory of the expanding Universe and the 'primeval atom' model, later called the Big Bang. He derived the law later named after Hubble and estimated the expansion constant two years before Hubble's publication. His ideas reconciled scientific cosmology with philosophy.

Biography

Georges Lemaître was born in Charleroi, Belgium. He studied civil engineering, but after serving in World War I, he became a priest and became interested in physics. He received his doctorate from MIT under the supervision of Arthur Eddington and Harlow Shapley. In 1927, while solving Einstein's equations, he concluded that the Universe is non-static and expanding. His work went unnoticed until Einstein called it 'beautiful.' He later taught at the Catholic University of Louvain. He was a member of the Pontifical Academy of Sciences.

Key discoveries

💡 When Pope Pius XII tried to use Lemaître's theory to support a theological doctrine, the scientist sharply objected, stating that cosmology does not need divine intervention. Einstein, who initially rejected the non-static model, apologized to Lemaître after a lecture at the Solvay Congress.
Quote: "Scientific knowledge does not contradict faith, because they consider reality from different points of view."
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big banghydrogen
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Friedmann equationsHubble's law
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Johann Jakob BalmerArno PenziasRalph AlpherStephen HawkingEdwin HubbleErwin SchrödingerCecilia Payne-GaposchkinFred Hoyle

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