Question on: SS2 Physics - Space Physics and Astrophysics
Explain the main components of the Big Bang Theory and the evidence that supports it.
The Big Bang Theory states that the universe originated from a singularity and has been expanding ever since. The main components of the theory are as follows:
- Singularity: The universe started as an infinitely small, hot, and dense point called a singularity.
- Expansion: The universe is continuously expanding, with galaxies moving away from each other.
- Cosmic Microwave Background (CMB): The CMB is a faint, uniform radiation discovered in 1965, which is considered the afterglow of the Big Bang. Its presence and characteristics provide strong evidence for the Big Bang Theory.
- Redshift: The observation of redshift in the light coming from distant galaxies indicates that they are moving away from us, supporting the idea of an expanding universe.
- Abundance of light elements: The abundance of light elements such as hydrogen and helium in the universe matches the predictions made by the Big Bang Theory.
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