big bang theory noun
Definition of big bang theory
: a theory in astronomy: the universe originated billions of years ago in an explosion from a single point of nearly infinite energy density
— compare STEADY STATE THEORY
Examples of big bang theory in a Sentence
Recent Examples on the Web
The old big bang theory as developed by Georges Lemaître, [George] Gamow and others is based on Einstein's theory of general relativity.
— Alexander Hellemans, Scientific American, "A Conversation with Thomas Hertog, One of Stephen Hawking’s Final Collaborators," 24 May 2018
If the big bang theory is an explanation on how the universe was created, then what existed before the big bang occurred?
— Dan Vergano, Cincinnati.com, "Stephen Hawking, legendary physicist, dies at 76, family says," 14 Mar. 2018
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