Big Bang of the world happened a little before the beginning of space and time. During the 1930s other ideas were proposed as non-standard cosmologies to explain Hubble's observations, including the Milne model, the oscillatory universe (originally suggested by Friedmann, but advocated by Albert Einstein and Richard Tolman) and Fritz Zwicky's tired light hypothesis. After World War II, two distinct possibilities emerged. One was Fred Hoyle's steady state model, whereby new matter would be created as the universe seemed to expand. In this model the universe is roughly the same at any point in time. The other was Lemaître's Big Bang theory,
Steady state model Big Bang theory predicted as much, the steady state model predicted that such objects would be found throughout the universe, including close to our own galaxy. By 1961, statistical tests based on radio-source surveys had ruled out the steady state model in the minds of most cosmologists, although some proponents of the steady state insisted that the radio data were suspect. For most cosmologists, the definitive refutation of the steady state model came with the discovery of the cosmic microwave background radiation in 1964, which was predicted by the Big Bang theory. The steady state model explained microwave background radiation