How is the age of the galaxy determined?
A) Measuring the metallicity of Population II stars.
B) Finding the turnoff point in the H-R diagram of globular clusters.
C) From the motion of stars in the galactic halo.
D) Counting the number of open clusters in the spiral arms.

Question

Quizplus · Accepted Answer

The age of the galaxy is determined by finding the turnoff point in the H-R diagram of globular clusters, as these clusters contain some of the oldest stars.

How Is the Age of the Galaxy Determined