The BIG BANG
     In an instant
     Billions of years ago
     Enormous explosion

What to expect to support the theory
      Matter hurled apart
      Moving apart
      Evidence of energy left over from the explosion
             Hubble’s law- 1920 (Edwin Hubble)
                    Supports the big bang theory
                           observance that the farther away a galaxy was, the faster it seems to be moving away from earth,
               found that there is a mathematical relation between how far away a galaxy is and how fast it is moving away from us.

            Cosmic Background radiation
                   1965
                   Detected fainted radiation on radio telescope
                   Left over thermal energy
                    Distributed in every direction
                          http://www.spacesounds.com/home/index.html
 
                    Doppler Shift
                          Moving from Earth
                          Red-Blue shift
                             What happened to the cosmic background radiation as the universe expanded ?
                                Wavelength increases
                             The velocity of a galaxy is measured using the Doppler effect.
                                 The radiation coming from a moving object is shifted in wavelength:

     Age of the Universe
           13.7 billion year old

Dark Matter
    makes up about 23 percent of the universe's mass-energy budget.
    normal matter,
        the stuff of stars, planets and people, contributes just 4 percent.
    rest of the universe is driven by an even more mysterious thing called dark energy.
    small portion already been identified
        no longer mysterious.
        tiny particles called neutrinos
        now known to make up small portion of the total dark matter.
       cold dead stars  contribute  a little

http://www.space.com/scienceastronomy/dark_matter_animated_030415-1.html