What do we call the bright, sphere-shaped region of stars that occupies the central few thousand light-years of the Milky Way Galaxy?
A) the galaxy's disk
B) the galaxy's bulge
C) a globular cluster
D) the galaxy's halo
Question 2
How does the diameter of the disk of Milky Way Galaxy compare to its thickness?
A) The diameter and thickness are roughly equal.
B) The diameter is about 100 times as great as the thickness.
C) The diameter is about 10 times as great as the thickness.
D) The diameter is about 100,000 times as great as the thickness.