摘要
Asupernowt is a transient astronomical event of spectacular peak brightness that is associ-a ted with an exploding star. Supernovae exhibit a range of observational characteristics that historically h^ts led to a rich set of classsifications and sub-clmssifications. Despite the complex- ity of the obscrwttionally-based supernova, taxonomy, we now believe that all supernovae are caused by just one of two basic inechanisms： （i） the collapse of the core of a inassive star late in its litb, or （ii） a runaway thermonuclear explosion in a white dwarf. The former is terlned tile cor^-collapsc mechanism, and is powered by gravitational energy
Asupernowt is a transient astronomical event of spectacular peak brightness that is associ-a ted with an exploding star. Supernovae exhibit a range of observational characteristics that historically h^ts led to a rich set of classsifications and sub-clmssifications. Despite the complex- ity of the obscrwttionally-based supernova, taxonomy, we now believe that all supernovae are caused by just one of two basic inechanisms： （i） the collapse of the core of a inassive star late in its litb, or （ii） a runaway thermonuclear explosion in a white dwarf. The former is terlned tile cor^-collapsc mechanism, and is powered by gravitational energy
