A BRIEF EXPLANATION OF THE BIG BANG The cosmological theory called the big bang theory implies that the universe began from a singular state of infinite density. This theory was explained in the complete solution of Albert Einstein's equations, obtained by Aleksandr Friedmann in 1922. In 1927, Georges Lemaitre used these equations to devise a cosmological theory incorporating the concept that the universe is expanding from an explosive moment of creation. The theory was further developed in …showed first 75 words of 283 total…

…showed last 75 words of 283 total…with cosmology. As we now know, the universe is expanding. The American Astronomer, Edwin Hubble proved this theory right by discovering that the spectra of all external galaxies are red-shifted. This implies that the galaxies are getting farther away from us meaning that the universe is expanding. But what’s expanding? According to Einstein the fabric of time-space is what’s expanding. This new theory changed the way we thought about the universe and gravity.