In spiral galaxies, the size of the central bulge is correlated with the
A) tightness of the spiral arms.
B) luminosity of the galaxy.
C) age of the galaxy.
D) thickness of the disk.
E) presence of an active nucleus.

Question

Quizplus · Accepted Answer

The size of the central bulge in spiral galaxies is correlated with the tightness of the spiral arms, as larger bulges tend to have more tightly wound arms.

In Spiral Galaxies, the Size of the Central Bulge Is