The big bang is often compare to an explosion. But it is more a dilatation of the space from an unique point which would have contain the universe. This theory appeared because d the universe expansion was observed.
Big bang theory today is an explanation of how did universe begin. At its simplest, it says that the universe started with a small singularity, then inflating over the next few billion years to the cosmos that we know today.
The name “Big Bang Theory” has been popular for decades, but it hit the mainstream in 2007 when a comedy show with the same name premiered on CBS.
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