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22)identify one piece of evidence that led astronomers to infer that the universe is expanding? 23)identify the force that caused stars and planets in the universe to become layered according to density differences in their composition? 24)identify the nuclear process that combines lighter elements into heavier elements to produce the energy radiated by stars?
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22)identify one piece of evidence that led astronomers to infer that the universe is expanding? 23)i...
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