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Created by: Paris
Created on: 21-01-13 16:06

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P1 - Topic 3 - Waves & The Universe
- Distance between Earth and the Sun is 1AU
  - 1AU = 150,00,00KM
    - Distance to edge of solar system is 30.07AU
      - 'Proxima Centuri' is the closest star to our solar system. 271,000AU and 4.2 LIGHT YEARS away
        Light Year - Distance it takes for light to travel in a vacuum in 1 Earth year
        Light travels 300,00km per second.
        Takes light 8 minutes to reach Earth from the Sun
        
        Takes 4.2 Light years for to light to reach us from Proxima Centuri
        
        The Milky Way is a spiral galaxy. It's 100,000 light years to travel the diametre
        Our galaxy is one of billion in the universe, they estimate 93 billion light years to cross it.
  - Distance to edge of solar system is 30.07AU
    - 'Proxima Centuri' is the closest star to our solar system. 271,000AU and 4.2 LIGHT YEARS away
      - Light Year - Distance it takes for light to travel in a vacuum in 1 Earth year
        Light travels 300,00km per second.
        Takes light 8 minutes to reach Earth from the Sun
        
        Takes 4.2 Light years for to light to reach us from Proxima Centuri
        
        The Milky Way is a spiral galaxy. It's 100,000 light years to travel the diametre
        Our galaxy is one of billion in the universe, they estimate 93 billion light years to cross it.
- Methods of collecting data about the universe
  - NAKED EYE: Humans use visible light that we can see to gather data
  - Telescopes: Use EM Spectrum to gather information.
    - Help you see object in the universe clearer and in more detail and give you an accurate source as it is real
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