The Big Bang Theory: The matter of the entire universe came from a very hot central point. Sooner or later, the center point began to cool ... 15 million years agoBack then, these atoms were united by gravity. This region exploded and the matter extended by all the territory universe In the first second after the universe, the surrounding temperature was about 10 billion degrees Fahrenheit (5.5 billion degrees Celsius). The cosmos contained a wide range of fundamental particles, such as neutrons, electrons, and protons. These vanished or merged as the universe cooled.
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