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Astronomy HW Astronomy HW
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3 years ago
Why are Cepheid variables important?
      
a. Cepheid variables are stars that vary in brightness extremely rapidly as they rotate on their axes.
      
b. Cepheids are a type of young galaxy that helps us understand how galaxies form.
      
c. Cepheids are supermassive stars that we observe because they will soon undergo supernovae.
      
d. Cepheid variables are stars that brighten and dim with a period that is directly related to the star's luminosity.
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#1
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3 years ago
Quote from: Astronomy HW (3 years ago)
d. Cepheid variables are stars that brighten and dim with a period that is directly related to the star's luminosity.
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