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Which is evidence that scientists use to support the big bang theory? A. Earth is the only planet with permanent liquid water on its surface. B. Most orbits have an elliptical shape. C. Most galaxies are moving away from each other. D. The outer planets are mostly composed of hydrogen and helium.
C. Space is currently expanding, and as a result of that expansion, the galaxies are moving away from each other. Scientists can track the location of the expansion at a certain point in our Universe. This is where the idea that the Universe was produced from one single point in space came from.
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