What event occurs at the end of the protostar stage of a star's life?

Answer 1

red dwarf

Answer 2

If its high mass it ends with neutron star of black hole and if its low mass it ends as a black dwarffor all stages check here What_are_the_stages_of_a_star's_life_cycle

Answer 3

It depends. If the star is a star the size of the Sun or smaller, then the core throws off much of its mass and becomes a white dwarf. The star eventually cools and dims over an extremely long period of time, becoming a black dwarf (there are no known stars at this stage).

If it's a massive star then the core collapses in less than a second, causing an explosion called a supernova, in which a shock wave blows off the outer layers of the star. Sometimes the core survives the explosion. If the surviving core is between 1.5 and 3 solar masses, it contracts to become a tiny, very dense neutron star. If the core is much greater than 3 solar masses, the core contracts to become a black hole, which is a concentrated mass called a singularity exerting massive gravity.

Answer 4

It depends on what star cycle they follow.

If the star is massive enough it will explode in a supernova. This burns off all the leftover energy of the star and the core will collapse into a black hole.

If it's mass is not great enough to cause a supernova then it will become either a neutron star or a black dwarf.

Answer 5

When a star is born it moves to the lower right path of the Main Sequence of the H-R Diagram (Phase one). This is where the star begins Hydrogen ---> Helium fusion. When a star runs out of Hydrogen the core cools and the outer layers expand forming a red giant. This is where the star on the Main Sequence moves off into the Giant Branch (Phase two). When the star regains Hydrostatic equilibrium (fuses Helium to Carbon) it moves to the Horizontal Branch (Phase three) where it spends a few months burning up all the Helium. When the star runs out of Helium, it's core cools and the outer layers expand, AGAIN, making the red giant become a red giant again (Super giant) in which it moves up the Asymptotic Branch (Phase four) the last phase the star waits to explode.

Asymptotic Branch is where the end of the star's life begins. This is the phase carbon is fused to every element up to Iron.

Answer 6

A star is dead once it ceases nuclear fusion in its core. Stars such as white dwarfs, neutron stars, and black holes are therefore 'dead' stars.

Answer 7

protostar 1st. nebula 2nd. protostar 3rd. main sequence 4th. red gaint or super giant 5th. white dawrf 6th. black dwarf

Answer 8

When the star starts fusing hydrogen in it's core.

Answer 9

A white dwarf, a neutron star or a black hole - depending on the amount of the remaining star's mass.

Answer 10

Nuclear fusion reactions begin and the protostar becomes a true star.