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Big Bang
| Date | 13.8 billion years ago |
|---|---|
| Location | Everywhere |
| Coordinates | N/A |
| Type | Cosmic event |
| Theme | Formation of the universe |
| Cause | Unknown |
| Participants | All matter and energy in the universe |
| Outcome | Formation of the universe and the laws of physics |
The Big Bang is a physical theory about how the universe started expanding, and then made the stars and galaxies we see today. The Big Bang is the name that scientists use for the most common theory of the universe,[2][3][4] from the very early stages to the present day.[5][6][7] The most commonly considered alternatives are called the Steady State theory and Plasma cosmology, according to both of which the universe has no beginning or end.[8]
According to the theory the Big Bang began as a very hot, small, and dense superforce (the mix of the four fundamental forces), with no stars, atoms, form, or structure (called a "singularity"). Then about 13.8 billion years ago,[1] space expanded very quickly (thus the name "Big Bang"). This started the formation of atoms, which eventually led to the formation of stars and galaxies. It was Georges who first noted (in 1927) that the universe is expanding. The universe is still expanding today, and getting colder as well.
As a whole, the universe is growing and the temperature is falling as time passes. Cosmology is the study of how the universe began and its development. Some scientists who study cosmology have agreed that the Big Bang theory matches what they have observed so far.[1]
- ↑ 1.0 1.1 1.2 NASA. "Universe 101:Big Bang theory". Retrieved 2010-01-28.
- ↑ Overbye, Dennis (20 February 2017). "Cosmos Controversy: The Universe Is Expanding, but How Fast?". The New York Times. Retrieved 21 February 2017.
- ↑ Kurki-Suonio, Hannu (2018). "Cosmology I" (PDF). University of Helsinki. p. 9-10. Retrieved 30 January 2019.
- ↑ Kornreich, Dave (27 June 2015). "Can we find the place where the Big Bang happened? (Intermediate)". Ask an Astronomer, Cornell University. Retrieved 20 October 2018.
- ↑ Silk, Joseph (2009). Horizons of Cosmology. Templeton Press. p. 208. ISBN 9781599473413.
- ↑ Singh, Simon (2005). Big Bang: The Origin of the Universe. Harper Perennial. p. 560. ISBN 9780007162215.
- ↑ Wollack, Eddie J. (10 December 2010). "Cosmology: The Study of the Universe". Universe 101: Big Bang Theory. NASA. Archived from the original on 14 May 2011. Retrieved 2017-04-15.
The second section discusses the classic tests of the Big Bang theory that make it so compelling as the likely valid description of our universe.
- ↑ Lerner, Eric John (2004).
Open Letter on Cosmology / Cosmology Statement. New Scientist. Wikisource.
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