Three pieces of evidence of universe expansion support the Big Bang theory. The first piece of evidence, which Edwin Hubble discovered, is that galaxies are moving away from each other and the space between them is expanding. This observation is known as Hubble's Law.
The second piece of evidence is the change in universal temperature. The temperature of the universe was much hotter in the past and has been cooling down over time. This is consistent with the idea that the universe originated from a hot, dense state, as predicted by the Big Bang theory.
The third piece of evidence is that cosmic microwave background radiation is found throughout the universe. This radiation is a faint afterglow of the early universe, which was discovered accidentally in 1965 by Arno Penzias and Robert Wilson. Its existence lends strong support to the Big Bang theory as it is considered a remnant of the intense heat of the initial expansion.
three pieces of evidence of universe exspansion support the big bang theory. the first piece of evidence, which edwin hubble discovered, is that _________________. the second piece of evidence is the change in universal temperature. the temperature______________. the third piece of evidence is that cosmic microwave background radiation is found_______________(.
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