The age of a cluster can be estimated by
A) Observing the number of stars-larger numbers imply older cluster
B) Observing the number of stars-larger numbers imply younger cluster
C) Plotting the stars on an HR diagram-lower turnoff implies younger
D) Plotting the stars on an HR diagram-lower turnoff implies older
E) Plotting the stars on a color-color diagram-lower values imply older
Correct Answer:
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