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

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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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