  A core-collapse supernova will produce an enormous burst of neutrinos of all
flavors in the few-tens-of-MeV range. Measurement of the flavor, time and
energy structure of a nearby core-collapse neutrino burst will yield answers to
many physics and astrophysics questions. The neutrinos left over from past
cosmic supernovae are also observable, and their detection will improve
knowledge of core collapse rates and average neutrino emission. This review
describes experimental techniques for detection of core-collapse neutrinos, as
well as the sensitivities of current and future detectors.
