It is assumed that stars in a star cluster
A) all have the same age.
B) all have the same chemical composition.
C) all have the same luminosity.
D) all of the above
E) a and b above

Question

Quizplus · Accepted Answer

Stars in a star cluster are assumed to have formed from the same molecular cloud, meaning they generally have the same age and chemical composition, but not necessarily the same luminosity.

It Is Assumed That Stars in a Star Cluster