Here's why they're different:
* High Mass: Their immense mass means they have a lot of fuel (hydrogen) to burn. They also generate much higher temperatures and pressures in their cores, which allows them to fuse heavier elements.
* Short Lifespan: Because of their high mass, they burn through their fuel much faster than smaller stars. This gives them a much shorter lifespan, typically only a few million years.
* Internal Instability: The intense fusion processes in their core eventually lead to instability. The star can no longer sustain itself against its own gravity, causing a catastrophic collapse.
Two main types of supernovae:
* Type II supernovae: These happen when massive stars run out of fuel, causing their cores to collapse into a neutron star or a black hole.
* Type Ia supernovae: These occur in binary star systems where a white dwarf star accretes matter from a companion star. When the white dwarf reaches a certain mass, it becomes unstable and explodes.
Important Note: Not all massive stars become supernovae. Some may simply shed their outer layers and become white dwarfs.
