- According to the big-bang model, the universe expanded rapidly from a highly compressed primordial state, which resulted in a significant decrease in density and temperature. Soon afterward, the dominance of matter over antimatter (as observed today) may have been established by processes that also predict proton decay.www.britannica.com/science/big-bang-model
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What is the Big Bang Theory? | Space
2023年7月26日 · The Big Bang Theory explains how the universe began with an infinitely hot and dense single point that inflated to form the ever-expanding cosmos we see today.
Big Bang - Wikipedia
The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. The notion of an expanding universe was first scientifically originated by physicist Alexander Friedmann in 1922 with the mathematical derivation of the Friedmann equations.
Independent of Friedmann's work, the Big Bang was first proposed in 1931 byWikipedia · CC-BY-SA 许可下的文字The science behind the Big Bang theory | Astronomy.com
2023年12月18日 · Evidence of the Big Bang theory and what happened immediately after the expansion. By Astronomy Staff | Published: December 18, 2023 | Last updated on December 20, 2023
The Big Bang - NASA Science
Overview The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries. New ideas and major discoveries made during the 20th century transformed cosmology – the term for the way we …
The history of the universe: Big Bang to now in 10 easy …
2022年2月2日 · The history of the universe and how it evolved is broadly accepted as the Big Bang model, which states that the universe began as an incredibly hot, dense point roughly 13.7 billion years ago....
History of the Big Bang theory - Wikipedia
The history of the Big Bang theory began with the Big Bang's development from observations and theoretical considerations. Much of the theoretical work in cosmology now involves …
What happened in the early universe? | Center for Astrophysics ...
The Big Bang theory of cosmology successfully describes the 13.7 billion years of evolutionary history of our Universe. However, it is known that the current Big Bang theory cannot self …
Big Bang Theory: Evolution of Our Universe - Universe …
2015年12月17日 · The discovery and confirmation of the cosmic microwave background radiation in 1965 secured the Big Bang as the best theory of the origin and evolution of the universe. From the late 60s to...
WMAP Big Bang Theory - NASA
2012年3月1日 · The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few millimeters across.
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