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A Brief History Of The Universe
What Was There Before The Big Bang?
This is something we don't know but there are a few theories floating about.
A Big Crunch
One very bored God
If there was nothing then how did the Universe come to be?
This question is the sort that will give you a major headache if you think about it for to long.
We know that Energy is not created or destroyed. It is converted from one type to another meaning there must have been something that caused the Big Bang. So if there was nothing there would still be nothing. But if there was something how it that come to be? (Told you it would give you a Headache.)
This points to the idea of a Cyclic Universe and a Big Crunch preceding the Big Bang.
It could also be used to show that God did create the Universe.
The Cyclic Universe
The Cyclic Universe in Religion and Science
As it says in the above image the Cyclic Model is an infinite Cycle where a Universe is born expands, contracts then implodes in a Big Crunch that triggers a Big Bang.
Not only is the Cyclic Model part of Buddhist and Hindu Religion it is also a scientific theory used by some scientists to try to explain how the universe began.
The Big Bang And The Early Universe
Matter is pushed out with the force of the explosion. This matter is a soup like mix of particles that collide with each other.
After the Big Bang
The Universe Expands at a rapid pace. Despite this expansion the Universe is kept in a state of near perfect thermal equilibrium by the continuing collisions between the matter.
The Universe would have been a dark place in the first 400 million years as up until that point no stars had formed.
It took around 1 billion years for the first Galaxies to form.
Our Solar System formed around 8.7 billion years after the Big Bang.
The early universe would have been a very hot place to be, but as it expanded it cooled. As it cooled things started to slow down. Today the universe is a very cold place to be unless you are in or near to a star.
Further reading on the early universe
Other Scientfic theories.
The Big Bang or Standard Model and The Cyclic Model are not the only theories to have been proposed about the Universes Creation.
The Steady State Theory