  These lectures cover three topics in neutrino astrophysics. The solar
neutrino problem is reviewed, with particular emphasis on the microphysics of
the standard solar model, detector responses, the quantum mechanics of the MSW
mechanism, and the possibility of spin-flavor oscillations. In the second
lecture the electromagnetic properties of Dirac and Majorana neutrinos are
discussed. Two classic problems in red giant evolution - the triple alpha
reaction and the delay of the He flash by anomalous cooling - are used to
illustrate how stellar cooling arguments constrain neutrino properties. Axion
and Dirac neutrino mass effects on supernova cooling are also discussed. The
third lecture describes the supernova explosion mechanism and the associated
nucleosynthesis. The neutrino process and r-process are discussed, including
the "neutrino fingerprint" on the latter that supports earlier suggestions that
the r-process site is near the mass cut of a type II supernova. The effects of
tau neutrino oscillations on the r-process are described briefly. The material
is presented at a level suitable for graduate students at the beginning of
their research careers.
