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the big bang occured.
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massive explosion accured after the big bang!
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the universe cooled 10 billion degrees after the massive explosion.
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protons and neutrons appeared after the universe cooled 10 billion degrees.
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hydrogen and helium and atomd formed after the protons and neutrons forned.
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clustered galaxies formed after hydrogen and helium formed.
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the milky way formed after clustered galaxies.
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hydrogen nuclei formed after the milky way.
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the sun formed after hydrogen nuclei.
