The first piece of evidence that Edwin Hubble discovered was that the universe is expanding. In the early 1920s, Hubble observed the redshift of light from distant galaxies and found that these galaxies were moving away from us. He created a relationship between the distance of a galaxy and its velocity, known as Hubble's Law. This was a groundbreaking finding that provided strong evidence for the Big Bang Theory and fundamentally changed our understanding of the universe.
The first piece of evidence which Edwin Hubble discovered is that
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