The Universe
_______________________________________________________________________________________________________________________________________________________________________________________________________________________

10. The Big Bang Theory

The Big Bang theory is the most widely accepted cosmological explanation of how the universe formed.


If we start at the present and go back into the past, the universe is contracting — getting smaller and smaller. What is the end result of a contracting universe?

According to the Big Bang theory, the universe began about 13,7 billion years ago. Everything that is now in the Universe was squeezed into a very small volume. Imagine all of the known universe in a single, hot, chaotic mass.

An enormous explosion — a big bang — caused the Universe to start expanding rapidly.

All the matter and energy in the Universe, and even space itself, came out of this explosion.

What came before the Big Bang? There is no way for scientists to know since there is no remaining evidence.

This video explains the Big Bang Theory and the History of the Universe, and shows the evidence for this Theory.

A

L

N

C