Important information can be obtained from the H-R diagram of a star cluster because all stars in the cluster have approximately the same
A) Doppler shift.
B) age.
C) spectral type.
D) luminosity class.

Question

Quizplus · Accepted Answer

The H-R diagram of a star cluster is useful in determining the age of the stars in the cluster because all stars in the cluster are believed to have formed at approximately the same time, so they have similar ages. The other choices are not necessarily true for all stars in a cluster.

Important Information Can Be Obtained from the H-R Diagram of a Star