  In 2002, Ray Davis and Masatoshi Koshiba were awarded the Nobel Prize in
Physics ``for pioneering contributions to astrophysics, in particular for the
detection of cosmic neutrinos.'' However, while astronomy has undergone a
revolution in understanding by synthesizing data taken at many wavelengths, the
universe has only barely been glimpsed in neutrinos, just the Sun and the
nearby SN 1987A. An entire universe awaits, and since neutrinos can probe
astrophysical objects at densities, energies, and distances that are otherwise
inaccessible, the results are expected to be particularly exciting. Similarly,
the revolution in quantitative cosmology has heightened the need for very
precise tests that depend on the effects of neutrinos, and prominent among them
is the search for the effects of neutrino mass, since neutrinos are a small but
known component of the dark matter. In this report, we highlight some of the
key opportunties for progress in neutrino astrophysics and cosmology, and the
implications for other areas of physics.
