Problem
A. Describe and locate the following on a spiral galaxy: disk, bulge, and halo.
B. Where does a majority of star formation occur in spiral galaxies? Why?
C. What's the difference between HI and HII regions?
D. What's the difference between population 1 vs population 2 stars and where do they reside in the galaxy?
E. What the differences between open clusters and globular clusters?