Question

Define Big Bang??? please make it fast

Answer 1

the rapid expansion of matter from a state of extremely high density and temperature which according to current cosmological theories marked the origin of the universe.

Answer 2

Answer:

The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.

More details about Big Bang :

• Initial singularity was before the Big Bang.
• Big Bang at around 13.8 billion years ago.