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Concept

Big Bang Theory

Also Known As Big Bang
Cosmology and the Early Universe

The prevailing cosmological model describing the universe's expansion from an extremely hot, dense initial state roughly 13.8 billion years ago. It is supported by the observed redshift of distant galaxies, the cosmic microwave background radiation, and the relative abundance of light elements.

Facts
Concept Domain
Cosmology 1
Formulated Year
1927 2
Year Georges Lemaitre proposed an expanding universe; the name Big Bang was coined later by Fred Hoyle in 1949.
Proposed By
Georges Lemaître 1
Connections

Associated With

Big Bang Nucleosynthesis, Concepts
Cosmic Background Explorer, Observatories and Instruments

COBE results supported the hot Big Bang model

Cosmic Inflation, Concepts
Source Wikipedia (space and spaceflight articles)
Cosmic Microwave Background, Concepts

Its 1965 detection provided decisive evidence for the Big Bang model.

Source Wikipedia (space and spaceflight articles)
Cosmic Microwave Background, Concepts
Source Wikipedia (space and spaceflight articles)
Cosmological Constant, Concepts
Source Wikipedia (space and spaceflight articles)
Dark Energy, Concepts
Source Wikipedia (space and spaceflight articles)
Dark Matter, Concepts
Source Wikipedia (space and spaceflight articles)
Heat Death of the Universe, Concepts
Hubble's Law, Concepts
Multiverse, Concepts
Olbers' Paradox, Concepts
Source Wikipedia (space and spaceflight articles)
Redshift, Concepts

Galaxy redshifts are a principal line of evidence for the expanding universe the Big Bang model describes.

Source Wikipedia (space and spaceflight articles)
Redshift, Concepts
Source Wikipedia (space and spaceflight articles)
Reionization, Concepts
In the Other Atlases

Originated In

Georges Lemaitre

Also in Science Atlas: where this subject originated.

Source Wikipedia (space and spaceflight articles)
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia Foundation
  • Big Bang, Before the name section
    In 1931, Lemaitre went further and suggested that the evident expansion
  • Associated With: Cosmic Microwave Background
  • Associated With: Redshift
  • Associated With: Dark Matter
  • Associated With: Dark Energy
  • Associated With: Cosmic Inflation
  • Associated With: Cosmological Constant
  • Associated With: Olbers' Paradox
View the Source
2. Encyclopedia Britannica: Space Exploration
Encyclopedia Britannica, Inc.View the Source
Big Bang (Wikipedia)
Big Bang, lead section
Quote, Big Bang, lead section
The Big Bang is a physical theory that describes how the universe expanded from
View the Source
Big Bang Theory (Wikipedia)
In Group: Big Bang Cosmology and Measurements, Lead sentence
Quote, In Group: Big Bang Cosmology and Measurements, Lead sentence
The Big Bang is a physical theory that describes how the universe expanded from an early state of high density and temperature.
View the Source

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