2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/8181We present details of our investigation of the progenitors to core-collapse supernovae. We discuss observations and the theory of the lowest-mass stars to explode as supernovae.4 pages, 2 figures, for the conference 1604-2004 Supernovae as Cosmological LighthousesAstrophysicstext