The Steady State Theory
The steady state theory is that the universe has always existed and will stay the same now and in till the end of time. This theory was believed by Fred Holye born in England 1915. Supporters of this theory agreed that the universe was getting bigger and something’s were further away than before.
The Big Bang Theory
The big bang theory is the complete opposition of the steady state theory. It is believed that 15 thousand millions years ago our universe was born by a massive burst of energy. After this there was suddenly time what happened before the big bang nobody knows. But because off this burst of energy how universe was created in about a 100 trillion, trillion, trillion, trillion times a second. After about a thousand millions years the temperature cooled and the hydrogen atoms lost energy, so gravity pulled them together to form big clouds. With more cooling the clouds collapsed further to form galaxies.