These papers discuss theoretical aspects of neutrino astrophysics as related to recent experimental results. The lectures are on the fundamentals of solar model theories, including nuclear reactions, radiative opacities, equations of state, and various plasma effects. Another series of lectures present the basic elements of MSW theory and show its relation to solar neutrino experiments, to the theory of supernova explosions and to atmosphere neutrinos. These lectures also place MSW theory, and its related extensions, in the context of other recent developments in weak interaction theory. The role of neutrinos and other possible weakly interacting particles are described in conventional and unconventional cosmological theories; the relation of these ideas to recent cosmological observations is stressed. The consequences of the possible demonstration of a small neutrino mass of the order suggested by MSW theory is outlined in the context of a general discussion of physics beyond the standard electroweak model.
In addition, special lectures are given on the status and plans of individual neutrino experiments, with some discussion of the possibilities of new terrestrial tests using reactors and accelerators. Also, special lectures on astronomical sources of high-energy neutrinos and on the ratio of electron-neutrinos to muon neutrinos in atmospheric neutrino experiments are presented.