•Chapter 7: The Sun
 –Atmospheric
 Structure
 •Temperature, density,
 etc., with radius
 –Sunspots/Magnetic
 Phenomena
 •What are they?  Why do they exist?
 –Nuclear Fusion –
 proton-proton chain
 •What is it?  How does it produce energy?
 –Solar Neutrino
 “Problem”
 •What is it?  Is it still a problem?