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

Question

Quizplus · Accepted Answer

Type O and B stars have short lifetimes and exhaust their fuel quickly, causing them to burn out faster than type F and cooler stars. Therefore, a cluster containing only type F and cooler stars would be older than a cluster containing type O and B stars. Type F and cooler stars are less massive than type O and B stars, meaning they have longer lifetimes. Therefore, a cluster containing only type F and cooler stars will be older than a cluster containing type O and B stars.

Compared to a Cluster Containing Type O and B Stars