1. Determine the order of redshifts in Figure 15-8 from highest blueshift to lowest. FIGURE 15-8 2. Describe the rotation curve you would get if the Galaxy rotated like a rigid body. 3. Compare the...

1. Determine the order of redshifts in Figure 15-8 from highest blueshift to lowest.

FIGURE 15-8

2. Describe the rotation curve you would get if the Galaxy rotated like a rigid body.

3. Compare the apparent distribution of open clusters, which contain young stars, with the distribution of globular clusters in the Milky Way. Why are open clusters also referred to as galactic clusters?