2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47113Supernova 1987A became a milestone in physics and astronomy. The most important things that have been learned from it, the most important problems yet to be solved and the prospects for learning important new physics from future observations of nearby supernova explosions are shortly summarized.Invited talk, to appear in the Proceedings of the 1997 Rencontre de Physique de la Vallee d'Aoste, ItalyHigh Energy Physics - PhenomenologyAstrophysicstext