Short note on big bang theory

The big bang theory considers the following stages in the development of the universe >:

1:> In the beginning , all matter forming the universe existed one place in the form of a "tiny ball" [singular atom] with an unimaginably small volume infinite temperature and identify density .


2:>At the big bang the " tiny ball " exploded violently .this led to a huge expansion . it is now generally accepted that the event of big bang took place 13.7 billion years before the present day .as it grew , some energy was converted into matter . within first three minutes from the big bang event the first atom began form .


3:>Within 30,00,000 year form the big bang , temperature droped to 4,500 K and gave rise to atomic matter . the universe became transparent .