1. The solar system were located at the center of the Milky Way Galaxy? What would we see, and how would things be different on Earth? 2. A globular cluster were crossing the disk of the Milky Way in...

1. The solar system were located at the center of the Milky Way Galaxy? What would we see, and how would things be different on Earth?

2. A globular cluster were crossing the disk of the Milky Way in our vicinity right now? What would we see, and how might things be different on Earth?

3. To test your understanding of our Galaxy’s rotation, do Interactive Exercise 15-1 on the Web. You can print out your results, if required.