The Universe

Origin

• The "Big Bang" theory

Untitled Slide

• The Universe is 13.8 billion years old
• As a result, we can observe objects that have a creation process of millions of years

Nebula

• Cosmic dust and gases
• The color changes between blue and red

Star cluster

• It is a group of stars who are nearly
• They have a big luminosity

Galaxy

• A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, and cosmic dust
• The shape can vary: spirals, eliptics, irregulars...
• The galaxies who are near make up a galaxy cluster

Black hole

• It is the result of a massive star's death
• It is called black because the light can't go out and we can't see inside them
• In science fiction appeared the concept of "warm hole"

Quasar

• Quasars are objects with a galaxy's luminosity and a star's size
• It is believed that they are galaxy's active cores but it is not sure.

End

• Big rip
• Big crunch
• Big freeze or big whisperer

Biggest questions

• Antimatter vs. matter
• Dark matter and dark energy
• Theory of everything

Untitled Slide