Spectra as a Tool

We've gone through the lab on Stellar Spectra
http://sohowww.nascom.nasa.gov/home.html
Reading 1
The VIREO LAB on Stellar Spectra

What else can we use spectra for?


Doppler Shift reading (Book, 102-104)

Where have we seen this?


Activity:  http://carma.astro.umd.edu/AWE/Doppler/redshift.html


Based on the applet shown, what will happen when

a) a star moves towards the earth
b) a star moves away from the earth
c) the star and the earth are both moving towards one another
d) the star and the earth are both away from one another

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Spectra can also be shown in a graphical form

Let's look here:   http://casswww.ucsd.edu/archive/public/tutorial/Stars.html

What happens to the graph form when the line is black on the prism version?
What do the numbers at the bottom of the graph mean?

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How can I red-shift or blue-shift a star?

http://www.classzone.com/books/earth_science/terc/content/visualizations/es2802/es2802page01.cfm

What is happening?

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How does a galaxy spectra differ from a regular spectra....

http://www.galaxyzooforum.org/index.php?topic=1923.0

http://www.astro.washington.edu/users/anamunn/Astro101/Project1/stellar_spectroscopy_introduction.html

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Are galaxies moving towards or away from us?

http://www.astro.washington.edu/courses/labs/clearinghouse/labs/HubbleLaw/knowgalaxies.html

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What elements are present in an atmosphere (HOMEWORK)


http://lasp.colorado.edu/home/wp-content/uploads/2011/08/Goldilocks_Three_Planets_student.pdf


http://lasp.colorado.edu/home/education/k-12/project-spectra/goldilocks-interactive/ 

http://lasp.colorado.edu/home/education/k-12/project-spectra/goldilocks-interactive/When you get done with these, you will need to complete a one to two page summary (do not just answer the questions).  It may be handwritten.

Starlight
1. Contrast Emission and Absorption Spectra
2.  What element do all stars contain?
3.  Why do we talk about 'stellar fingerprints'?

Star Collection
1. What did you notice about using the telescope regarding speed, ability to slew, ability to get a signal-noise ratio that was 100 or more, and the fine vs. gross adjustments?
2.  Why is RA/DEC important, and what is UTC?
3.  How is technology helpful and difficult as we look at the world of starlight?


Star Analysis
1.  The stellar classification system we use today was developed by Annie Cannon was actually based on her work sorting thousands and thousands of spectra into categories, which then became the stellar atlas.  What do the classification OBAFGKML letters tell us about temperature or brightness of a star?