Question

What are the three end stages of stars?

Answer 1

A white dwarf, also known as the degenerate dwarf mainly contains electron degenerate matter. After a star forms a planetary nebula, it leaves behind the remnant white dwarf. A neutron star is formed when a massive star runs out of fuel and collapses.

Complete answer:
A black hole is formed by the demise of an enormous star. At the point when such a star has depleted the inner nuclear powers in its center toward the finish of its life, the center gets temperamental and gravitationally falls internal upon itself, and the star's external layers are blown away.

The three end stages of stars are:
White Dwarf: this stage has a very high density compared to that of the earth. Very stable and has a small size. As the name suggests, it appears white in color. Initial mass of this star would be lesser than $8{M_{sun}}$ (mass of the sun, value is $1.9891 \times {10^{30}}kilo\,grams$)

Neutron star: It is completely made up of neutrons just as the name suggests. They are also stable in nature. The initial mass of this stage will be between $8{M_{sun}}$ and $25{M_{sun}}$.

Black hole: This stage of a star has the highest gravitational pull. It absorbs everything, including the light that falls on it causing it to appear just as it sounds, as a “black hole”. Mass of this stage will be greater than $8{M_{sun}}$ but not limited to $25{M_{sun}}$.

Note: The confusion between the neutron star and black hole phase may occur because of the similarity in their mass category but, black holes have the most gravitational pull. The neutron star has a harder surface and is the denser object.