CH 11 HW due 5/:16
Review Questions
1. Why does Helium fusion require higher temperature than Hydrogen fusion?
5. How can star clusters confirm astronomer’s theories of stellar evolution?
8. How can a star of as much as 8 solar masses form a white dwarf when it dies?
15. Why do you expect neutron stars to spin rapidly? Why do you expect neutron stars to
have a powerful magnetic field?
21. What evidence can you cite that black holes really exist?
Discussion Question
3. Why wouldn’t an accretion disk orbiting a giant star get as hot as an accretion disk
orbiting a compact object?

Go to the Griffith Observatory Link at the top of this page. Then go to “The Sky” tab,
click on the “Weekly Sky Report” Check it out and name 3 items you can see in the sky.
Try to find them, draw a sketch of what you find.