Big Bang theory

A scientific theory describing the origin of all space, time, matter, and energy approximately 13.7 billion years ago from the violent expansion of a singular point of extremely high density and temperature.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

big′ bang′ the`ory

a theory that the universe began with an explosion of a dense mass of matter and is still expanding from the force of that explosion.

[1950–55]

big bang theory

The idea that the universe began with an explosion 13–20 billion years ago. According to the theory, formulated in 1927, the universe is still expanding. It is now obsolete to some extent. Compare steady state theory.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

big bang theory - (cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature

big-bang theory

scientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable"

cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe

Translations

teoria del Big Bang

Mentioned in

References in periodicals archive

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Channel 4

Unfortunately, every time new observations conflict with Big Bang theory, the theory adds on one more tortured, ad hoc conjecture to save itself.

Big Bang bashing

"The Big Bang theory predicted that an afterglow radiation from the young hot era would still permeate the sky today," explains NASA astronomer Charles Bennett.

Hey, baby! (Space/Big Bang Theory)