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Cepheid variable stars have fluctuating masses. Some astronomers attempt to use these stars to

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Cepheid variable stars have fluctuating masses. Some astronomers attempt to use these stars to

(A) Compare to dying stars to determine time of stellar death

(B) Mark distances throughout a galaxy

(C) Map solar system

(D) Both B and C

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Correct option: (B) Mark distances throughout a galaxy

Explanation:

Brighter stars were shown to have longer periods. This period-luminosity relation could be used to measure distances to nearby galaxies. The time it takes for a star to brighten and fed can be used to compare brightness of find distance. 

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