(theory of the big bang) - big Bang Theory: supone que hace entre unos 14 000 y 15 000 millones de años, toda la materia del universo (lo cual incluye al universo mismo) estaba concentrada en una zona extraordinariamente pequeña, hasta que explotó en un violento evento a partir del cual comenzó a expandirse - starting from that it can be a mini particle, we speak of a particle the size of "an atom", imagine that atom reaching a mega explosion; explosion that was boosted and began to expand and accumulated in several points. In that expansion, matter was grouped and accumulated to give rise to the first stars and galaxies, thus forming what we know as the universe.
¿if the universe will continue to constantly expand for the rest of time or if, on the contrary, an event similar to the one that gave rise to it can cause the whole universe to contract again (Big Crunch)?
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From @yukai