Big Bang
Big Bang
Big Bang (/bɪɡ bæŋ/) is a cosmological model that explains the inception of the universe. The term is more popularly known in the field of Astronomy and Physics.
Etymology
The term "Big Bang" was coined by British astronomer Fred Hoyle in 1949 during a radio broadcast. It is a somewhat pejorative reference to a theory Hoyle did not accept, a theory that suggests the universe originated from a very hot and dense state nearly 13.8 billion years ago.
Definition
The Big Bang theory is the prevailing cosmological model for the observable universe from the earliest known periods through its subsequent large-scale evolution. The model describes how the universe expanded from an initial state of high density and temperature, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the Cosmic Microwave Background (CMB) radiation, and the Hubble expansion.
Related Terms
- Cosmology: The science of the origin and development of the universe.
- Hubble's Law: The observation in physical cosmology that galaxies are moving away from each other.
- Cosmic Microwave Background: The thermal radiation left over from the time of recombination in Big Bang cosmology.
- Universe: All existing matter and space considered as a whole; the cosmos.
See Also
- Inflation (cosmology)
- Chronology of the universe
- Cosmic Background Explorer
- Redshift
- Galaxy formation and evolution
External links
- Medical encyclopedia article on Big Bang
- Wikipedia's article - Big Bang
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