Question

explain big bang theory​

Answer 1

Hello ❤❤

The universe is believed to be at least 10 billion light years in diameter and contains a vast number of galaxies; it has been expanding since its creation in the Big Bang about 13 billion years ago. ❤❤

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Answer 2

Answer:

The Big Bang Theory is the leading explanation about how the universe began. The Big Bang theory is a cosmological model for the observable universe from the earliest known periods through its subsequent large-scale evolution. 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.