The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. It was first proposed in 1927 by Roman Catholic priest and physicist Georges Lemaître . In the standard theory, acceleration occurs after the big bang because of an ad hoc inflaton field. In the prebig bang scenario, it occurs before the bang as a natural outcome of the novel The Big Bang Theory or Big Bang Theory is the most widely accepted cosmological model at present in science, that is, the most accepted explanation of the origin of the Universe currently. Its name, "big bang", means "big bang" in English. Its name comes from the explanation that it proposes for the beginning of all things: an original The Big Bang theory is the most widely supported theory on the birth of the universe. It states that about 13.8 billion years ago, the universe expanded and cooled from an infinitesimally small According to the theories of physics, one second after the Big Bang, the heat of the universe caused atoms to collide with enough force to create a ten billion degree soup of neutrons, Multiverses and parallel worlds are often argued in the context of other major scientific concepts like the Big Bang, string theory and quantum mechanics. Related: How big is the universe? .

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