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During the first billion years or so, matter in the explanding universe clumped together to form enormous clouds that eventually collapsed to become galaxies and clusters of galaxies.
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The Universe began between 13 and 14 billion years ago as a dense, hot, massive amount material exploded with violet force.
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Along the planets in our solar system, the sun bagan forming nearly 5 billion years ago from a large interstellar cloud called a nebula.
