big bang theory
Noun
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(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 (synset 105896518)
referred to in: cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universeis a type of: scientific theory - a theory that explains scientific observationssame as: big-bang theory
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