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Explain the big bang theory
The big bang theory explains how the universe began. Imagine the entire universe squeezed into a tiny, hot, dense space, like a balloon before you pop it. About 13.8 billion years ago, this area suddenly began to expand very rapidly—like rolling out of a tube. This expansion is what we call the BigRead more
The big bang theory explains how the universe began. Imagine the entire universe squeezed into a tiny, hot, dense space, like a balloon before you pop it. About 13.8 billion years ago, this area suddenly began to expand very rapidly—like rolling out of a tube. This expansion is what we call the Big Bang.
As the universe expanded, it began to cool. Imagine boiling water freezing. When hot, the particles did not stick together. But as it cooled, these particles began to combine into atoms. These atoms are like tiny building blocks for everything around us.
Over a long period of time, these atoms combined to form stars, planets, and galaxies—enormous collections of stars that can be seen in the night sky even now as the universe expands and galaxies move away from each other . . . .
Scientists have found evidence of the Big Bang by observing light from distant galaxies that appear to be expanded and red as if they were pulling on a rubber band They also observed traces of bright light, called cosmic microwave background radiation, which left in the Big Bang .
Simply put, the Big Bang theory tells us that the universe began with a small, hot explosion, and has been expanding and cooling ever since, creating everything we see today.
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