Mark+Big+Bang+THeory

In 1912 scientist Vesto Slipher measured the first doppler shift of a spiral nebulae. The implications of this discovery at the time were not known, but it would lead other scientists to piece together an alternate and natural theory on the origin of the universe. Ten years later with the work of Russian mathematician Alexander Friedman yielded his Friedman equations, (based on the work of Einstein's Theory of Relativity). Two years later in 1924, Edward Hubble's research showed that what had until then been known as spiral nebulae were in fact other galaxies. Without previous knowledge of Friedman's Equations, Belgian physicist and priest Georges Lemaitre developed Friedman's Equations independently in 1927, speaking to the truth of them and their application.



http://en.wikipedia.org/wiki/Big_Bang#Speculative_physics_beyond_Big_Bang_theory