The Sun appears to rotate only because the Earth is revolving about the Sun.
Indicate whether the statement is true or false
Question 2
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.