A star much more massive than the Sun eventually runs out of hydrogen fuel. Explain the sequence of events that follows, from the point at which hydrogen fusion ends, until a final compact object remains.

When hydrogen fusion stops, the core can no longer support the overlying layers and the star collapses under its own gravity. The collapse raises the core temperature and pressure, so that heavier elements (helium, carbon, oxygen, etc.) begin to fuse. As the core becomes iron‑rich, no further energy can be produced by fusion, so the core continues to collapse until it becomes too massive to support itself. The collapse then rebounds, driving a shock wave that ejects the outer layers in a supernova explosion. The supernova disperses the newly‑synthesised elements into the interstellar medium. After the explosion the remnant core is either a neutron star (if its mass is below the Tolman–Oppenheimer–Volkoff limit) or a black hole (if it exceeds that limit).