Summary:
- Georges Lemaître was a Belgian Catholic priest and physicist who proposed the idea of the "Big Bang" theory, which suggests that the universe began from a single, extremely hot and dense point.
- Lemaître's theory was based on his observations and calculations, which showed that the universe is expanding, and that this expansion could be traced back to a single starting point.
- Lemaître's work laid the foundation for our modern understanding of the origin and evolution of the universe, and his ideas have been supported by numerous scientific observations and experiments over the years.