FA 5_The Big Bang Theory and Cosmology

• The evidences that support the Big Bang theory:

  • Abundance of light elements
  • Cosmic microwave background radiation
  • Expansion of the observable universe
• UNIVERSE VS. OBSERVABLE UNIVERSE

  Universe

  • actual universe we live in
  • maybe infinitely big
  • probably does not have edges

  Observable Universe

  • part of the universe we can observe and see
  • has finite edges and we are at the center
  • much smaller than the actual universe
• The Big Bang Theory

  • a theory that aims to explain how the universe began 13.7 billion years ago
  • most accepted theory regarding the origin of the universe