Big bang theory

model according to which the universe was created from a gigantic explosion of one point

The Big Bang is the cosmological model of the universe whose primary assertion is that the universe has expanded into its current state from a primordial condition of enormous density and temperature. The term is also used in a narrower sense to describe the fundamental "fireball" that erupted at or close to an initial timepoint in the history of our observed spacetime.
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Noun
1. (cosmology) the theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature
(synonym) big-bang theory
(hypernym) scientific theory
(classification) cosmology, cosmogony, cosmogeny

Noun
1. (cosmology) the theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature
(synonym) big bang theory
(hypernym) scientific theory
(classification) cosmology, cosmogony, cosmogeny

TEORIA DEL BIG BANG. TEORIA DELL'ESPLOSIONE PRIMORDIALE