If the stars at the turnoff point of a cluster have a mass of 3 M?, what is the age of the cluster?
a. 3.0 x 1010 years
b. 3.3 x 109 years
c. 6.4 x 108 years
d. 1.6 x 1011 years
e. The age of a star cluster can not be determined from the mass of stars at the turnoff point.
C
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