Question

what is big bang and big bang theory ?and who founded it?​

Answer 1

Explanation:

A Belgian priest named Georges Lemaître first suggested the big bang theory in the 1920s, when he theorized that the universe began from a single primordial atom

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

Answer 2

Explanation:

The Big Bang theory is a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution. ... Edwin Hubble concluded from analysis of galactic redshifts in 1929 that galaxies are drifting apart; this is important observational evidence for an expanding universe.