How do stars generate energy in their cores, and once made, how is\nthat energy transported to the surface where it can be radiated away\nas Luminosity? This lecture revisits nuclear fusion and the Kelvin-Helmholz\nMechanism, and discusses the 3 ways energy can be transported in stars:\nRadiation, Convection, and Conduction. This will lead us to the\nconcept of Thermal Equilibrium in stars, which is the last main piece\nof stellar physics we need before we can address the question of how\nstars are formed and evolve in the rest of this Unit.\nRecorded 2006 January 23 in 1008 Evans Laboratory on the Columbus campus\nof The Ohio State University.