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What do you think of when you look at the night sky?. http://www.astro.ufl.edu/~lada/ast3018/lectures/ast3018lecturestarform.pdf. What is Space?. Not really empty Stars, planets, etc. Interstellar medium Dust and Gas Nebulas. Orion Nebula

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what do you think of when you look at the night sky
What do you think of when you look at the night sky?

http://www.astro.ufl.edu/~lada/ast3018/lectures/ast3018lecturestarform.pdf

what is space
What is Space?
  • Not really empty
  • Stars, planets, etc.
  • Interstellar medium
    • Dust and Gas
    • Nebulas

Orion Nebula

http://hubblesite.org/gallery/album/nebula/pr1995044a/

Large Magellanic Cloud

http://hubblesite.org/gallery/album/nebula/pr2006055a/

nebular hypothesis
Nebular Hypothesis
  • Random collisions of atoms
  • Areas of growing mass
    • Spherical shape
    • Pull in more matter
    • Increase in
      • Temperature
      • Pressure
    • Spin
      • Creates a bulge in the sphere

http://physics.uoregon.edu/~jimbrau/BrauImNew/Chap06/FG06_17.jpg

nuclear fusion
Nuclear Fusion
  • High temperatures
  • 2 particles become 1
  • Releases a lot of energy
    • Video clip
  • Particle accelerators
    • Man-made
    • Create new elements
    • Find smallest particles

http://www.universetoday.com/52696/nuclear-fusion-power-closer-to-reality-say-two-separate-teams/

Fermi National Lab

http://www.wired.com/playbook/2012/08/olympics-physics-hammer-throw/

spectroscopy activity
Spectroscopy Activity
  • Draw the lines that you see
    • Make sure the # of lines, color of the lines and order is accurate
  • Write a conclusion – based on your observations what can you conclude about the different materials and light you see the material produce
warm up 1
Warm Up #1
  • Clicker Quiz
  • Compare conclusions from the spectroscopy activity
  • Turn in your research topic
what does a spectrum tell us
What does a spectrum tell us?
  • Each chemical/atom has a unique spectrum
    • Like a fingerprint
  • What chemicals are present

http://www.umsl.edu/~physics/Lab%20Connection/Electricity%20and%20Magnetism%20Lab/12-lab13.html

how is a spectrum created
How is a spectrum created?
  • All objects emit light
  • Pure light from a source
    • Continuous spectrum
  • If light passes through gas or dust
    • Light absorbed
    • Excites/heats atoms
    • Emit own light
    • Makes an emission spectrum
    • Unique

https://www.cfa.harvard.edu/~jbattat/a35/cont_abs_em.html

how do astronomers use spectra
How do astronomers use spectra?
  • Look at light from
    • Stars (gas in outer layers)
    • Nebula
  • Determine chemical composition
  • Can also determine movement of object
  • Activity

http://www.eso.org/public/outreach/eduoff/cas/cas2004/casreports-2004/rep-236/

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