Some of the most energetic events in the universe occur when stars explode in an incredible release of energy known as a supernova. although every supernova is characterized by a sudden, intense brightening, the differences in types of progenitor stars and the mechanisms of detonation produce two distinct supernova types: type i and type ii. rank the following steps that lead to a type i supernova event in order of when they occur from first to last. rank the steps of the supernova mechanism from first to last.