There are many factors involved, perhaps the most important is the mass of the star.
The star go through various stages and end in a final state depending on that mass.
It can grow to a red giant and eventually settle to a white dwarf and ultimately a black dwarf.
It can explode as a nova or supernova in which case it can end as a neutron star, pulsar or black hole, once again depending on the mass
Because they begin to run out of fuel
Neutron stars do not have fuel. A neutron star is a remnant of a star that has already died.
The first stage is jettisoned, to fall back to earth, as the fuel runs out.
The primary fuel for all stars is hydrogen
Long-lived stars are typically lower in mass, shine less brightly, and have longer lifespans compared to short-lived stars. Short-lived stars tend to be more massive, burn through their fuel more rapidly, and have shorter lifespans before evolving or ending in a supernova explosion.
Because they begin to run out of fuel
larger stars have longer lives, because as stars burn they are slowly burning up fuel and begin to cave in on themselves. the larger, the more fuel, the more fuel, the longer lasting.
When a fuel filter goes out, a vehicle will typically begin to bog out. It will begin losing power and RPM's will not come as quickly.
Neutron stars do not have fuel. A neutron star is a remnant of a star that has already died.
When they run out of fuel they collapse and become black holes.
What actually happens to the types of stars is that the low mass will turn into a white dwarf and the medium mass will turn into a black dwarf and reproduce a nebula
The first stage is jettisoned, to fall back to earth, as the fuel runs out.
The first stage is jettisoned, to fall back to earth, as the fuel runs out.
The primary fuel for all stars is hydrogen
Engine will be hard to start, stall, and may not even run. Replace the fuel filter first thing.
Long-lived stars are typically lower in mass, shine less brightly, and have longer lifespans compared to short-lived stars. Short-lived stars tend to be more massive, burn through their fuel more rapidly, and have shorter lifespans before evolving or ending in a supernova explosion.
Supernovae occur in stars that have reached the end of their life cycle and have run out of nuclear fuel to support their core. This typically happens to massive stars with at least eight times the mass of the sun.