Coverage of Topics and Study Notes:

Chapter 20 is very well written, and I have only a few comments.

I like to cover the CNO Cycle in More Precisely 20-1 as a significant topic which is of considerable importance to high mass stars.

I'll give a more detailed explanation for electron degeneracy in class.

In general, there are more details in this chapter than I can cover in class. Use your class notes as the main study guide for the important topics and facts.

Review and Discussion:  Skip numbers 6, 7, and 17. However, you should know the definition of a black dwarf (it's part of 17).

Conceptual Self-Test:  True or False/Multiple Choice:  Skip 16.

Problems: Skip them all. I don't think these problems add to understanding the material of this chapter. Some of them are beyond the level of AS151. For students who want a challenge, they are each good as review or to point out interesting facts.