Neutrinos are responsible for releasing gravitational potential energy in one type of this process.
The reverse shocks associated with this process can cause the leftover material to be overionized. Neutrinos are responsible for releasing gravitational potential energy in one type of this process. A drop in photon pressure due to increased pair production causes the "pair instability" variety. The R- and S-processes associated with one variety of these events are responsible for the universe's heavy elements. These events, responsible for the formation of the Crab Nebula, are classified by their spectra into Type I and Type II. For 10 points, name this process in which a star cataclysmically explodes.
The reverse shocks associated with this process can cause the leftover material to be overionized.
Supernovae [accept Supernovas; do not accept "nova(s)" or "novae"]