Since Georges Lemaître first noted in 1927 that an expanding universe could be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. The scientific community was once divided between supporters of two different theories, the Big Bang and the Steady State theory, but a wide range of empirical evidence has strongly favored the Big Bang which is now universally accepted.

Teoria Wielkiego Wybuchu została sformułowana w 1927 roku przez Georgesa Lemaîtra, belgijskiego opata i astronoma.

Georges Edouard Lemaître war ein belgischer Theologe, katholischer Priester und Astrophysiker. Er gilt als Begründer der Urknalltheorie.