Summary: Big Bang and the Universe

The Big Bang

It's a theory about the origin of the Universe

 - It started from a dense atom that exploded.
 - It increased 90 times its size, very fast.
 - Nowadays, It is still expanding, but at a slower rate.
 - At first, it was a dark place because atoms weren't formed.
 - Recombination: next, atoms were formed and  the Universe became transparent.
 - Finally, galaxies and stars were created.


The origin of the Solar System

 - It was born 9 billion years after The Big Bang.
 - Its age is about 4.6 billion years.
 - The Sun and the Solar System were formed from a cloud of gas called Solar Nebula
 - This nebula collapsed, it spun faster and flattened into a disk.
 - Most of the material was concentrated in the centre and the Sun was formed.
 - The rest formed planets, satellites, comets, etc...

Dark Matter

 - Mysterious and invisible mass formed by exotic particles that don't interact with light or regular matter.
 - It is inferred because of the gravitational pull.
 - It is the 23% of the Universe , with 4% being regular matter.


Dark Energy

  - Strange, pulling and expansive force that remains undetected and makes 73% of the Universe.




By Luis Andrés.