A nova is a star which has a close companion star, and draws stellar material off of it's companion, occasionally flaring up very brightly in the process. A supernova is a massive and hot star to begin with, that tends to go through it's life cycle at high speed, and ending it's life in a cataclysmic explosion. Supernova remnants then collapse into a neutron star - a spinning, very hot pile of stellar ash, so dense that a teaspoonful of it would weigh thousands of tons. If the collapsed supernova star was big enough, it's gravity upon collapse is so intense than not even light can escape from it, and it becomes what is called a "Black Hole".
Supernova explosions are believed to generally result in a black hole, as the core of the star is collapsed into an unimaginably dense point mass. One can't really say that a black hole is any kind of star. Less powerful nova explosions probably result in pulsars or neutron stars.
A supernova, or in the case of a smaller star, a nova.
The death stage. It explodes and either collapses into a neutron star or collapses even more into a black hole in space.
The process of the stellar explosion is called a "nova", or if powerful enough, a "supernova". The outer layers of gas are blown away into space, and this shell of fleeing gas is sometimes called a "supernova remnant", or more generally, a "nebula". For example, the Crab Nebula is the gas cloud left over after a supernova explosion which was brilliantly visible here on Earth in the year 1054.
The gravity of a supernova is much greater than that of Earth. During a supernova explosion, the core of a massive star collapses rapidly, creating an incredibly dense object such as a neutron star or black hole, which exerts immense gravitational forces.
A supernova is when a massive star explodes. A neutron star is what can be formed after a supernova explosion. See related questions
Nuclear fusion stops and the star is no longer capable of transformming LIGHTER elements into HEAVIER. elements. At this point GRAVITY looses out and PRESSURE wins out thereby causing the supernova explosion. But bear in mind, there is a HUGE difference between an ordinary star going NOVA and a SUPERNOVA.
super nova
A nebula contains stars and other matter; a supernova is just a large enough nova, or star that explodes at the end of its life cycle due to spent fuel
Supernova
When a star explodes, it releases an immense amount of energy, creating a supernova. This explosion can outshine an entire galaxy for a short period of time. Supernovae are crucial for the formation of heavy elements and can also cause the star to collapse and form a black hole or neutron star.
A nova or a supernova
About 20 years.
A super nova isn't a person. A super-nova is a high mass star's explosion.
Supernova explosions are believed to generally result in a black hole, as the core of the star is collapsed into an unimaginably dense point mass. One can't really say that a black hole is any kind of star. Less powerful nova explosions probably result in pulsars or neutron stars.
The difference is 11 hours.
A supernova, or in the case of a smaller star, a nova.