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How did Edwin Hubble measure the distance to the Andromeda Galaxy? He measured its parallax. He used main-sequence fitting. He applied the period-luminosity relationship to Ceph…

How did Edwin Hubble measure the distance to the Andromeda Galaxy? He measured its parallax. He used main-sequence fitting. He applied the period-luminosity relationship to Ceph…
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How did Edwin Hubble measure the distance to the Andromeda Galaxy?

He measured its parallax.

He used main-sequence fitting.

He applied the period-luminosity relationship to Cepheid variables.

He deduced it from redshift.

User Tanatach
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Answer:

D- he applied the period- luminosity relationship to cepheid variables

User Vasily G
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