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Origin:
The Big Bang theory proposes that the universe began as a hot and dense singularity, a point of infinite density and temperature, about 13.8 billion years ago.
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Expansion:
This singularity suddenly expanded in an event called inflation, causing the universe to rapidly expand and cool down.
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Formation of Matter:
As the universe cooled, elementary particles like quarks and electrons began to form. These particles eventually combined to form atoms like hydrogen and helium.
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Formation of Galaxies and Stars:
Over millions of years, gravity caused these atoms to clump together, forming galaxies. Within galaxies, stars and planets formed from these clumps of matter.
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Cosmic Microwave Background (CMB):
As the universe continued to expand and cool, the radiation from the early hot phase stretched and cooled to form the Cosmic Microwave Background, which we can still detect today.
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Why It Is Vital To Know:
The Big Bang theory is supported by various pieces of evidence, such as the observed expansion of the universe, the cosmic microwave background radiation, and the abundance of light elements like hydrogen and helium. It provides a framework for understanding the origin and development of the cosmos.
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