Evidence other than the CMB provides support for the Big Bang theory is redshift proposed by Edwin Hubble.
The redshift that was suggested by Edwin Hubble is yet another piece of evidence that supports the Big Bang idea. His finding confirmed the theory that the universe is expanding as a result of the other galaxies' light's redshift.
Edwin Hubble declared in 1929 that nearly all galaxies looked to be revolving away from us. He discovered that the cosmos was actually expanding, with all of the galaxies moving apart. The spectrum of a galaxy was seen to change toward red due to this occurrence.
Edwin Hubble made two significant changes to our knowledge of the universe over the span of five years, contributing to the development of the Big Bang theory. He first showed that the universe is far bigger than previously believed before proving that it is expanding.
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