  Theoretical expectations concerning stars as neutrino sources are presented
according to detailed evaluations of the stellar evolutionary histories for an
extended grid of stellar masses. Neutrino fluxes and cumulative neutrino yields
are given for both `thermo-nuclear' and `cooling' neutrinos all over the
nuclear life of the stars and along the final cooling as White Dwarfs.
Predictions concerning the galactic and the cosmic neutrino background are
presented and discussed.
