Red giant.
A protostar is when a large gaseous cloud is coming together under gravity, in the early stages of a stars formation. The gaseous mass of the protostar has not got to the stage at which nuclear fusion reactions are taking place. The gas becomes hotter and more dense, until finally there is enough pressure and temperature to allow the hydrogen to fuse together, giving off energy as a main sequence star.
No, the black hole will swallow it because it's gravity is much stronger than the blue giant star.
Let me clarify one thing... Basically, ALL galaxies, or almost all of them, have a giant black hole at their center. (If any galaxy does NOT have such a supermasive black hole, then it is likely that it had one in the past, and that it was ejected out of the galaxy.)
quasar
After a nebula, a star's life cycle progresses to the formation of a protostar, where gravitational forces cause the gas and dust to collapse and heat up. As the protostar continues to accumulate mass, it eventually reaches temperatures and pressures sufficient for nuclear fusion to ignite in its core, marking the transition to the main sequence phase of a star's life. Depending on its mass, the star will then evolve through various stages, ultimately leading to its end state, which could be a red giant, supernova, or a white dwarf, neutron star, or black hole.
Nebula- protostar- Main Sequence Main Sequence- Red Giant- planetary nubula- white dwarf- black dwarf Main Sequence- Red Supergiant- supernova explosion- Nuetron star or a black hole
nebula then protosar then red dwarf, yellow star or a blue giant then a red giant then a red super giant then eithr a white dwarf or a supernova from the supernova a black hole or a neutron star if it is a white dwarf it turns into a black dwarf then a black holeNebulaBaby starStarGiant or supergiantWhite dwarfBlack dwarf
The mass of the progenitor star has to be massive to form a black hole and thus it will have a shorter time on the main sequence compared to a medium sized star.
The correct life sequence of a star starts with a protostar, which forms from a dense cloud of gas and dust. The protostar then evolves into a main sequence star, where it fuses hydrogen atoms to form helium in its core. Depending on its mass, the star will either become a red giant or a supergiant before eventually shedding its outer layers to become a white dwarf, neutron star, or black hole.
The pressure within a protostar counters gravity and prevents the star from collapsing further.
A blue star is formed from a collapsing nebula of dust and gas. It then goes through its main sequence phase where nuclear fusion occurs in its core, producing energy. Eventually, a blue star will evolve into a red giant or supergiant before shedding its outer layers in a violent explosion called a supernova.
A blue giant star goes through multiple stages during its life cycle: formation from a collapsing nebula, main sequence where it fuses hydrogen into helium, red giant phase where it expands and fuses heavier elements, and finally, depending on its mass, it may end as a supernova or a black hole.
Nebulae (gas and dust) protostar (formed by immense pressure in nebulae) ^ becomes either a Brown dwarf (basicall dead :P) or a Main sequence star which becomes: A Red giant (when MSS runs out f hydrogen ) if red giant is small it becomes a white dwarf and does nothing or a planetary nebulae if it's a big one it either becomes a Neutron star or a Black hole
A star, the size of our sun, does not explode into a supernova. Instead, toward the end of its life, it grows over 1000 times its size into what is called a Red Giant. After that it implodes and looses mass at a quick rate reaching the white dwarf stage. After that it is a black dwarf and looses all its energy and mass.
A Protostar doesn't really die. It is the early stage of star formation. If there is not enough mass you end up with a brown dwarf. If the mass is sufficient the next step is called a T Tauri star. The next phase would be a main-sequence star. Then depending on it's mass It will become a white dwarf or a red giant. If the red giant is massive enough the core collapse even more until the outer layers explode off, called a supernova. If the star was massive enough the core that is left behind will collapse into a neutron star or a black hole.
No, it does not appear to have a giant cross. It is called a "Black" hole because it absorbs all the light that hits the horizon, reflecting nothing.
At the centre of our Galaxy, the Milky Way