Georges Lemaître, Father of the Big Bang theory
Georges Lemaître (1894-1966) was initially destined for the engineering profession. But in November 1918, home from the front, he turned to mathematics and physics. Thanks to them, and his great talent, in thirty years, he was able to understand and, above all, establish convergences between Einstein's theory of relativity (1915) and the observations of the greatest astrophysicists of the 1920s.
They all shared the same questions: What is the universe made of? How should we understand space and time? In 1927 and 1931, Georges Lemaître posited two hypotheses which upset cosmology. The universe is expanding and its birth is the fruit of a concentration of energy's initial explosion.
Contemporary cosmology has preserved Lemaître's foundational intuitions and confirmed what he posited in theory. A “primitive atom” gave birth to the universe.
Françoise Hiraux, Clara Laduron and Camille Mostaert