TheverysmallandtheverylargeareintimatelyconnectedinNature. Particle physics and astrophysics meet in fundamental questions: the structure and evolution of stars; their end and how this is manifested; how we think galaxies are created from matter we have yet to discover and why we believe the most energetic particles cannot come from the most distant universe. During the IV Escuela Mexicana de Astrof ?sica (EMA-2005), held in the beautiful colonial...