Georges Lemaitre Biography and Timeline

Cosmology

Lemaitre studies relativistic cosmology and begins work that will connect general relativity to cosmic expansion

Expanding Universe with Lambda

Lemaitre develops an expanding relativistic universe in which the cosmological constant can influence the large-scale evolution of cosmic expansion.

Expanding Universe

Lemaitre derives an expanding universe model from general relativity and estimates an expansion rate

Hubble-Lemaitre Law

Lemaitre derives an expanding universe model and estimates the expansion rate from galaxy distances and velocities

Expanding Universe

Proposes an expanding universe from relativistic cosmology.

Role range: 1894-1966

Primeval Atom

Lemaitre proposes a primeval atom origin for the expanding universe within relativistic cosmology

Primeval Atom

Lemaitre proposes that the universe expanded from a primeval atom, an early form of Big Bang theory

Primeval Atom

Lemaitre lectures in the United States on the expanding universe and his primeval atom hypothesis

Vacuum Energy Interpretation

Lemaitre relates the cosmological constant to an energy density of empty space, anticipating the modern vacuum-energy interpretation of dark energy.

Cosmic-Radiation Origin Theory

Connects cosmic rays with processes in the early expanding universe.

Evolution of the Expanding Universe

Develops the primeval-atom model with radioactive cosmic evolution.

Big Bang Cosmology Book

Explains cosmic expansion from an extremely dense initial state.

The Primeval Atom Hypothesis

Publishes a book presenting his primeval-atom cosmological theory.