Cosmic Explosions : On the 10th Anniversary of SN1993J (IAU Colloquium 192) The proceedings of the conference Supernovae 2003 (IAU colloquium 192) provides an extensive state of the art survey of all theoretical and observational aspects of supernovae and gamma ray bursts as well as their impact on cosmology. This volume offers everyone working in this field an authoritative and comprehensive source of reference. The present volume includes a CD ROM with the printed proceedings plus poster descriptions and meeting photographs not printed in the book. The proceedings of the conference Supernovae 2003 (IAU colloquium 192) provides an extensive state of the art survey of all theoretical and observational aspects of supernovae and gamma ray bursts as well as their impact on cosmology. This volume offers everyone working in this field an authoritative and comprehensive source of reference. The present volume includes a CD ROM with the printed proceedings plus poster descriptions and meeting photographs not printed in the book