2. Big Bang Theory

3.  Also called Big Explosion.  States that 12,000 or 15,000 millions of years ago all the matter in the universe, which was concentrated in a very small area, exploded.  The matter was formed by the elemental particles (protones, electrones and neutrons) with a great amount of energy.  The explosion made the matter to rush out with energy in all directions.  This expanded the universe and made it stable, cold and dense.

4. Big Bang Theory  The crash and some disorder concentrated matter in some places more than in others.  This is how the first stars and galaxies were formed.  The theory states that from that moment the universe continues to be in constant movement and evolution.  This theory is mathematically correct since an instant after the explosion.  However it doesn´t explain the moment zero or the origin of the universe called singularity.