Quiz

1. What does our galaxy look like?
2. How do stars orbit in our galaxy?
3. How is gas recycled in our galaxy?
4. Where do stars tend to form in our galaxy?
5. What do halo stars tell us about our galaxy's history?
6. How did our galaxy form?
7. What lies in the center of our galaxy?
8.  Who is Andrea M. Ghez?
9. Who observed stars moving close to the speed of light in the center of our galaxy?
10. Where was Dr. Ghez born? 

Hint: Look up Andrea Ghez in Wikipedia