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Topics/Subjects:
Stars, nebulae and galaxies  
Materials Cost:
Free  
Instructional Strategies:
Generating and testing hypotheses  
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In this activity, students examine the first line of evidence, galactic motion, for the notion of an expanding universe. By examining the spectrum of light from a galaxy, students can determine whether a galaxy is moving toward or away from us, and... (View More)

Audience: Middle school, High school
Materials Cost: Free
1