In Febuary 1987, a supernova exploded in the Large Magellanic Cloud. The nearest supernova since 1604, it arrived at the right time to trigger the newest generation of neutrino detectors underground, a vast range of telescopes and cameras on Earth, and a few pre-Hubble space telescopes. Neutrino physicists are eager for another observation and have instruments ready and waiting---but there's nothing but luck to say whether the next Milky Way supernova will be in our lifetimes or not. In this talk, I will review some supernova neutrino physics and talk about a new result---the chance to get information about supernova neutrinos, maybe in our lifetimes, using an optical observable that reaches beyond the Milky Way.