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What important role do Cepheid variables stars have in astronomy?

symbo

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What important role do Cepheid variables stars have in astronomy?

What important role do Cepheid variables stars have in astronomy?
A)   Distance measurements to distant galaxies
B)   The determination of stellar luminosities
C)   The determination of speeds of stars in galactic arms from the Doppler shift of their spectra
D)   The keeping of accurate time

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Discovering the Universe

Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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hyponotica

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symbo Author

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It's correct Smiling Face with Open Mouth

Smiling Face with Open Mouth

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