Who proposed the Big Bang theory in 1931?
Georges Lemaître proposed the Big Bang theory in 1931. He was a Belgian priest and physicist who described the universe as beginning from a single point of infinite density called the primeval atom.
Common questions about Big Bang
Short answers, pulled from the story.
When was the cosmic microwave background discovered?
Arno Penzias and Robert Wilson discovered the cosmic microwave background in 1964. They found this uniform background radiation while working at Bell Labs in New Jersey.
What year did Alan Guth propose cosmic inflation?
Alan Guth proposed cosmic inflation in the early 1980s. This theory suggests the universe underwent exponential expansion in the first fraction of a second after the Big Bang.
When did astronomers discover that the universe expansion is accelerating?
Astronomers discovered that the universe expansion is accelerating in the late 20th century. This discovery revealed the existence of dark energy pushing the universe apart.
What is the mystery regarding matter and antimatter in the Big Bang theory?
The mystery regarding matter and antimatter in the Big Bang theory is why the universe is made of matter rather than antimatter. Matter and antimatter should have been created in equal amounts and annihilated each other, leaving only radiation.