Question

What is big bang theory?

Answer 1

 Big Bang is a scientific theory about how the universe started, and then made the stars and galaxies we see today. The universe began as a very hot, small, and dense superforce (the mix of the four fundamental forces), with no stars, atoms, form, or structure 

Answer 2

 

Definition of 'big bang theory'

Learner English American

big bang theory

  

singular noun

In astronomy, the big bangtheory is a theory that suggests that the universe was created as a result of an extremely large explosion.

COBUILD Advanced English Dictionary. Copyright © HarperCollins Publishers

big bang theory in British

(bɪɡ bæŋ ˈθɪərɪ)

  

noun

physics

the theory that the origin of the universe was in a cataclysmic explosion in which all the matter of the universe, packed into a small superdense mass, was hurled in all directions

Collins English Dictionary. Copyright © HarperCollins Publishers

big-bang theory in British

  

noun

a cosmological theory postulating that approximately 12 billionyears ago all the matter of the universe, packed into a small superdense mass, was hurled in all directions by a cataclysmic explosion. As the fragments sloweddown, the galaxies and starsevolved but the universe is still expanding

Compare steady-state theory
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