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Big Bang - Coggle Diagram

- - - - Redshift: everything is moving away from everything else and light is getting stretch out
      - Helium and Hydrogen: The universe was so hot and dense, only Helium and Hydrogen could form. Everything else just got ripped apart
      - Cosmic Microwave Background Radiation: A constant fuzz of weak light coming from every direction.
  - - - Thinking about the concept of space is hard. The concept of nothingness is even harder. Almost philosophical...
      - What we think of as “outer space” is NOT nothing.
      - While there is very little matter (physical stuff), space itself is a thing.
      - The Big Bang did not start in space. It created space itself!
- - - - You need to hear it many many times.
      - You need to embrace the confusion and accept that you won’t get it right away.
      - Understand that it doesn’t make sense to us because it’s nothing we’ve ever experienced
      - Acknowledge that the evidence is there and that this isn’t made up.
- - - - Both light and sound are waves
      - Waves radiate out of a source equally in all directions
      - When a source is moving (let’s say to the right), the waves bunch up closer in the direction of travel (again, to the right). The waves spread out on the opposite side (the left)
      - The bunching and stretching of waves changes the behavior.
      - Bunched sound waves have a higher pitch. Stretched sound waves have a lower pitch
      - Bunched light waves have a tighter wavelength (closer to blue/purple). Stretched lightwaves have a looser wavelength (closer to red)