A burnt-out collapsing star can rekindle itself if it has sufficient mass and conditions are right for nuclear fusion to resume. In the case of a massive star that has shed its outer layers, it might undergo a process called a supernova, which can trigger fusion in the core if the conditions allow. Additionally, in binary systems, a white dwarf can gain enough material from a companion star to reignite fusion. However, for most stars that exhaust their nuclear fuel, rekindling is not feasible.
Because all the material that could rekindle it has run out - there is none left.
When a nebula collapses due to gravitational forces, the center becomes denser and hotter. As the material in the center becomes more compact, the pressure and temperature increase, eventually triggering nuclear fusion reactions that sustain a star's energy. This marks the birth of a new star in the center of the collapsing nebula.
A direct result of a star collapsing could be the formation of a black hole. This occurs when the core of a massive star collapses under its own gravity, creating a region of space with such strong gravitational pull that not even light can escape.
While the star can produce energy, that keeps the star in balance - it keeps the star from collapsing. By the way, another outward force is the gas pressure, but that, by itself, is not enough to counteract the force of gravity in the case of a star.
A star that has exhausted its supply of hydrogen will evolve into a red giant or supergiant, depending on its initial mass. Eventually, it may undergo a helium flash and fusion of heavier elements before collapsing into a white dwarf or supernova.
An old star collapsing in on itself, to put it in simple terms.
Because all the material that could rekindle it has run out - there is none left.
Super nova
"While the star can produce energy, that keeps the star in balance - it keeps the star from collapsing. By the way, another outward force is the gas pressure, but that, by itself, is not enough to counteract the force of gravity in the case of a star."
hydrostatic
By a Star collapsing on its self.
The death of a star is called a supernova or stellar explosion. This is a catastrophic event that occurs when a star reaches the end of its life cycle and can result in the star either collapsing into a dense core (neutron star or black hole) or completely exploding.
The balance of forces that keep a star from collapsing is called hydrostatic equilibrium. This equilibrium is maintained between the inward force of gravity and the outward force generated by gas pressure within the star.
Dynamic equilibrium.
When a nebula collapses due to gravitational forces, the center becomes denser and hotter. As the material in the center becomes more compact, the pressure and temperature increase, eventually triggering nuclear fusion reactions that sustain a star's energy. This marks the birth of a new star in the center of the collapsing nebula.
A direct result of a star collapsing could be the formation of a black hole. This occurs when the core of a massive star collapses under its own gravity, creating a region of space with such strong gravitational pull that not even light can escape.
While the star can produce energy, that keeps the star in balance - it keeps the star from collapsing. By the way, another outward force is the gas pressure, but that, by itself, is not enough to counteract the force of gravity in the case of a star.