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Sound and hearing - conceptual question?

  1. Dec 15, 2009 #1
    Stars other than our sun normally appear featureless when viewed through telescopes. Yet astronomers can readily use the light from these stars to determine that they are rotating and even measure the speed of their surface. How do you think they can do this?
     
    Last edited: Dec 15, 2009
  2. jcsd
  3. Dec 15, 2009 #2

    Pythagorean

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    Gold Member

    Doppler shift?
     
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