yes, it is the stage where a star dies and turns into a blackhole
The death stage. It explodes and either collapses into a neutron star or collapses even more into a black hole in space.
A supernova occurs at the end of a massive star's life cycle.
When a star explodes as a supernova, it has finished it's main sequence, is in maturity and when it finally explodes it's in the stellar remnants stage.A white dwarf star is capable of turning into a supernova if the fusion action is reignited. It can also happen when a star starts to collapse.
The stage missing in the chart is the supernova explosion. When a star ten times more massive than the sun reaches the end of its life cycle, it undergoes a supernova explosion, where the star's core collapses and then rebounds outward in a powerful explosion, leaving behind either a neutron star or a black hole.
A supernova reaction occurs in the life cycle of a massive star that has exhausted its nuclear fuel and reaches the end of its life. The core of the star collapses under gravity, causing a powerful explosion that briefly outshines an entire galaxy.
No, Betelgeuse is not a main sequence star. It is a red supergiant star, which is a more evolved stage in the life cycle of a star compared to main sequence stars like the Sun. Betelgeuse is near the end of its life and is expected to go supernova in the relatively near future (on astronomical timescales).
The remnant core of a star that becomes a supernova will normally be a neutron star, or possibly a pulsar (a rapidly spinning neutron star). The largest of stars would theoretically create a black hole, a singularity containing all of the core's mass at a single point and preventing even light from escaping its massive gravity.
A giant star that ends it life in a supernova
It will end its life as a type II supernova.
No one knows for sure, since there is not enough information to figure it out. After a supernova, the star will either turn into a black hole, a neutron star, or a pulsar. But, there is no scientific evidence that proves which one the star will turn into after a supernova.
When a star explodes as a supernova, it has finished it's main sequence, is in maturity and when it finally explodes it's in the stellar remnants stage.A white dwarf star is capable of turning into a supernova if the fusion action is reignited. It can also happen when a star starts to collapse.
Our Sun is currently a main sequence star. It is not a supernova, as supernovae are massive explosions that occur at the end of a star's life cycle, and it is not a white dwarf, which is a type of star that has exhausted its nuclear fuel and collapsed to a very dense state.