  This review describes telescopes designed to study neutrinos from
astrophysical sources. These sources include the Sun and Supernovae emitting
neutrino energies up to tens of MeV, atmospheric neutrino sources caused by
cosmic ray interactions and other sources generating neutrino energies ranging
up to $1\times 10^{20}$ eV. Measurements with these telescopes also provide
information on neutrino properties including clear evidence for neutrino flavor
change. Telescopes in operation in the past and present are described, along
with plans for future instruments to expand this rapidly growing field of
particle astrophysics.

Astrophysics