Once a massive star builds a massive Iron/Nickel core at the end of

the Silicon Burning day, it is doomed. A catastrophic core collapse

is followed by explosive ejection of the envelope in a Supernova.

This lecture describes the stages of a core-bounce supernova explosion,

and the subsequent seeding of the interstellar medium with heavy

metals by the explosion debris. The fate of the collapsing core is

the subject of the next lecture in this series.

Recorded 2006 January 30 in 1008 Evans Laboratory on the Columbus campus

of The Ohio State University.