White dwarf.
white dwarf
A star, after using all of it's fuel explodes. We call this a super nova, and after this the star will either become a black dwarf star (or maybe a white dwarf) or it will collapse in on its self creating a black hole.
Depends on what star and at what point you classify it as dieing. As soon as a star is born it is "dieing" as it is using up the fuel that makes it.
The portion of a star's life cycle when it is using hydrogen for fuel is called the main sequence phase. This is when a star fuses hydrogen in its core to produce energy and maintain stability. Stars spend the majority of their lives in this phase.
Most stars process Hydrogen using nuclear fusion and turn it into Helium.
The phase of a star's life cycle where it is using hydrogen as fuel is called the main sequence phase. During this phase, a star converts hydrogen into helium through nuclear fusion in its core to produce energy and maintain its stability.
A collapsed star after using up its fuel is called a white dwarf, neutron star, or black hole, depending on its mass. White dwarfs are remnants of low to medium mass stars, neutron stars are remnants of massive stars, and black holes are formed when very massive stars collapse.
A neutron star is already the remains of a massive star that has run out of fuel.
Neutron stars do not have fuel. A neutron star is a remnant of a star that has already died.
I assume you mean, "how long a star lives". That depends mainly on the star's mass, with more massive stars using up their fuel way faster than less massive ones.
a dwarf star
A collapsed star after using its fuel is called a white dwarf, neutron star, or black hole, depending on its mass. White dwarfs are remnants of low to medium-mass stars, while neutron stars are remnants of massive stars. Black holes are formed from the most massive stars and have gravitational pull strong enough to trap even light.