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A supernova occurs AFTER a star collapses suddenly. See related question
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.
If enough matter comes together close enough, the collapse itself will generate enough heat (and pressure) for nuclear fusion. In other words, a star is created.
A protostar is a star that is just beginning to form out of a stellar nebular (under gravity). The core of the gravitational collapse is getting more and more massive and is heating up as a result of the gravimetric contraction but has not yet reached the point where nucleosynthesis has begun in its core. It is when this happens that it becomes a star.
A supernova happens when most of the core of the collapsing star has become neutrons, held up against gravity by neutron degeneracy pressure. At this point a shockwave reflects from the neutron star surface, driving the supernova explosion.So the answer to your question is neutrons.
A supernova occurs AFTER a star collapses suddenly. See related question
As interstellar clouds approach the spiral arm region it helps them to begin the collapsing process and eventually form a star.
The pressure within a protostar counters gravity and prevents the star from collapsing further.
Super nova
By a Star collapsing on its self.
hydrostatic
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.
Dynamic equilibrium.
A lot of scientists consider this phenomenon to be the origin of Black Holes, which result in a gravity point so dense that it will suck in anything within it's range and crush it into it's component molecules.
Direct Star was created in 2010.
An old star collapsing in on itself, to put it in simple terms.
A new star is called a new nova. It is the result of an explosion from an old star after reaching the end of its life. The remains will compress to form another star in its place.