Explore the fascinating world of massive stars' deaths and afterlives in this captivating lecture by Dan Milisavljevic of Purdue University. Delve into the powerful and significant phenomenon of supernova explosions, learning about their role in shaping galactic structures, producing exotic remnants like neutron stars and black holes, and creating the heavy elements essential for planetary formation and life itself. Discover how cutting-edge observational techniques, including the Hubble Space Telescope and facilities detecting electromagnetic energy, neutrinos, and gravitational waves, are opening new frontiers in understanding these cosmic events. Gain insights into specific supernovae like SN 1987A, the historical observations of Tycho Brahe, and the iconic Crab Nebula. Uncover the processes of nuclear fusion, the life cycle of stars like our Sun, and the methods used to reconstruct supernova remnants in this comprehensive exploration of stellar evolution and its cosmic impact.