Guests: CLASSROOM. Dr. Henry Hertzfeld, Dr. John Jurist, Dr. Jim Logan. Topics: Lesson 9 Launch Systems Analysis and Economics. Please see The Space Show Classroom blog, Lesson 9 Archive Notes for information about this show ( http://spaceshowclassroom.wordpress.com). Lesson 9 focused on launch system economics, markets, demand, and the definition of commercial versus government launchers. In our fist segment, our guest panel expert, Dr. Hertzfeld, defined commercial which as you will hear was no easy task to do.