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The Period-Luminosity Relationship for Cepheid Variable Stars,relating Variability to Absolute

Question 177

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The period-luminosity relationship for Cepheid variable stars,relating variability to absolute overall brightness,thereby providing identifiable beacons throughout our local space,was discovered by:


A) Harlow Shapley.
B) Henrietta Leavitt.
C) Edwin Hubble.
D) Sir Isaac Newton.

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