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Astronomy Astronomy
wrote...
3 weeks 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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wrote...
Educator
3 weeks ago
d. He used Cepheid variables in the Andromeda Galaxy.
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