It depends upon the size of the star. Stars like the sun, when they collapse, become white dwarfs which are made up of pure carbon (you can call it a diamond in space). Stars a lot bigger and heavier than the sun, collapse and become a neutron star, or a pulsar (rotating neutron star), or a black hole.
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.
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.
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.
white dwarf
White dwarf.
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.
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.
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.
It is called a nova.
Most stars process Hydrogen using nuclear fusion and turn it into Helium.
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A cold dead star is called a white dwarf. It is formed when a star has exhausted its nuclear fuel and collapsed under gravity, shrinking to a small, dense, and dim object.