Georges Lemeiter Belgian Catholic priest, astronomer and mathematician. Date of Birth: 17.07.1894 Country: Belgium

1. Early Life and Education
2. Academic Pursuits
3. Scientific Discoveries
4. The Big Bang Theory
5. Later Years and Legacy

Early Life and Education

Georges Lemaître was a Belgian Catholic priest, astronomer, and mathematician. Born in Charleroi, Belgium, he initially pursued engineering. However, the outbreak of World War I led him to serve as an officer in the Belgian army, where he received the Military Cross with palms.

After the war, Lemaître resumed his studies at the Catholic University of Louvain, focusing on mathematics, physics, and astronomy. He also studied theology in preparation for the priesthood. In 1920, he earned his doctorate in engineering and was ordained as a priest in 1923.

Academic Pursuits

Continuing his education, Lemaître traveled to Cambridge University in 1923, where he studied under renowned astrophysicist Arthur Eddington. He subsequently worked at the Harvard College Observatory and received a doctorate from the Massachusetts Institute of Technology.

In 1927, Lemaître became a professor of astrophysics at the University of Louvain. He also became a member of the Pontifical Academy of Sciences of the Vatican in 1940, later serving as its president in 1960.

Scientific Discoveries

Lemaître's most significant scientific contribution was his theory of an expanding universe. In 1927, he proposed that the observed redshift in the spectra of galaxies indicated their movement away from Earth, a phenomenon he interpreted as evidence for the expansion of the universe.

He also theoretically justified Hubble's law, which describes the relationship between the distance to a galaxy and its recessional velocity. This work laid the foundation for modern physical cosmology.

The Big Bang Theory

Lemaître's theory of the evolution of the universe from a "primordial atom" was dubbed the "Big Bang" by astronomer Sir Fred Hoyle in 1949. This term has become synonymous with the theory of the universe's creation and early evolution.

Later Years and Legacy

In 1941, Lemaître was elected to the Royal Academy of Sciences and Arts of Belgium. He published his seminal work, "L'Hypothèse de l'Atome Primitif," in 1946, which was translated into English as "The Primeval Atom Hypothesis" in 1950.

Lemaître received the Eddington Medal from the Royal Astronomical Society in 1953. He passed away in Louvain in 1966 at the age of 71. In his honor, a crater on the Moon and asteroid № 1565 are named after him.