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killian killian
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11 years ago
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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padrepadre
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11 years ago
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killian Author
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11 years ago
Thanks sir
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