big bang theory
Universe's explosive origin
The big bang theory is the prevailing cosmological model explaining the universe's origin—that it expanded from an extremely hot, dense state approximately 13.8 billion years ago.
The theory accounts for observable phenomena like cosmic background radiation and the expansion of galaxies.
The big bang theory replaced steady-state models in mainstream science.
Also the title of a long-running American sitcom about physicists.
- singularityPoint where values explode
- origin of the universeHow everything began
- expanding universeSpacetime stretching over time
- cosmic inflationUniverse's first exponential stretch
- general relativityGravity as curved spacetime
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