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Astronomy Astronomy
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3 years ago
How did Edwin Hubble measure the distance to the Andromeda Galaxy?
      
a. He measured its parallax.
      
b. He used white dwarf supernovae in the Andromeda Galaxy.
      
c. He deduced it from its redshift.
      
d. He used Cepheid variables in the Andromeda Galaxy.
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3 years ago
Quote from: Astronomy (3 years ago)
d. He used Cepheid variables in the Andromeda Galaxy.
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