The majority astronomers consider the Universe began in a Big Bang about 14 billion years ago. At that point, the complete Universe was within a bubble that was thousands of times lesser than a pinhead. It was hotter and denser than whatever thing we can envisage.
Then it abruptly exploded. The Universe that we are familiar with was born. All the three Time, space and matter began with the Big Bang. In a fraction of a second, the Universe grew from smaller than a solitary atom to bigger than a galaxy. And it kept on rising at a fantastic rate. It is still growing today.
As the Universe prolonged and cooled, energy distorted into particles of matter and antimatter. These two conflicting types of particles mainly smashed each other. But some matter survived. More steady particles called protons and neutrons on track to form when the Universe was one second old.
Over the next three minutes, the temperature dropped underneath 1 billion degrees Celsius. It was currently cool enough for the protons and neutrons to approach together, forming hydrogen and helium nuclei.
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