Compared to a cluster containing type O and B stars, a cluster with only type F and cooler stars will be

Question

Quizplus · Accepted Answer

Type O and B stars are much more massive and burn their fuel much more quickly than type F and cooler stars. Therefore, a cluster that has only type F and cooler stars is likely to be older because the type O and B stars it may have once contained would have already ended their life cycles.

Compared to a Cluster Containing Type O and B Stars