If the stars at the turnoff point of a cluster have a mass of 3M, what is the age of the cluster?
a. 3.0×10^10 years
b. 3.3×10^9 years
c. 6.4×10^8 years
d. 1.6×10^11 years
e. The age of a star cluster cannot be determined from the mass of stars at the turnoff point.
c
Physics & Space Science
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