Answer:
Longest : A. across the diameter of the galactic halo
B. across the diameter of the galactic disk
D. across the diameter of the central bulge
C. from the Sun to the center of the galaxy
Shortest : E. through the disk from top to bottom
Explanation:
- A halo is larger than the diameters of the disk and a disk is larger than diameters of central bulge and the sun being at the center of the universe is in the form of the disk but is outside the bulge.
- The disk is small and thinner as compared to its diameters that are about 1000 light-years in thickness and this property makes it flat.