write the Short note on Origen of universe?
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The universe is believed to have originated about 15 billion years ago as a dense, hot globule of gas expanding rapidly outward. At that time, the universe contained nothing but hydrogen and a small amount of helium. There were no stars and no planets.
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Here's your answer.
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The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began. ... The matter that spread out from the Big Bang developed into everything in the universe, including you.
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