AST 307 · Introductory Astronomy
Fall 2003


Chapter 21  Nov. 3, 5

  1. Why can't a red giant stay in thermal equilibrium once its core is made of iron nuclei?

  2. Describe what happens to the core of a red giant when it tries to continue nuclear fusion beyond iron, and what we see as a result.

  3. Describe how a white dwarf can be destroyed in a supernova explosion.

  4. How were the carbon and oxygen nuclei in your body made?
    How about the iron in your blood?

  5. Why couldn't the carbon in your body have been made in a star with a mass like the Sun's?

Chapter 22

  1. What is a neutron star? Describe its properties and how it is formed.

  2. What is a pulsar, and how do we explain its rapid flashing?

31 October 2003
Astronomy Program · The University of Texas at Austin · Austin, Texas 78712
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