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How did Edwin Hubble measure the distance to the Andromeda Galaxy?

killian

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How did Edwin Hubble measure the distance to the Andromeda Galaxy?

How did Edwin Hubble measure the distance to the Andromeda Galaxy?
A) He measured its parallax.
B) He applied main-sequence fitting to star clusters in Andromeda.
C) He applied the period-luminosity relation to Cepheid variables in Andromeda.
D) He measured its redshift and applied Hubble's Law.
E) He detected white dwarf supernovae in Andromeda.

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killian Author

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Thanks sir

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