When a main sequence star is less than 8 times of the Sun’s mass, it will start to collapse due to exhausted hydrogen.

The gravity will push against the force of fusion, but squeezing the core will increase temperature and pressure. When there is a lot of temperature and pressure, Helium will start to turn into carbon, which releases energy. The hydrogen fusion will cause the star’s outer layer to expand and turn a red giant, which can appear more orange than red.

The quick-lived but beautiful, mesmerizing end to a red giant.

As the star begins to die out, the star begins to contract and radiate energy. The expelled gas from the radiated energy will start to ionize, creating glowing rings around the core. On the outer layers, the molecules will cool and turn into metals. This “dying star” phase only lasts about a thousand to ten thousand years.

The white dwarf is the beginning of the star’s final stage.

When a Red giant sheds all of its atmosphere, only the core remains. A white dwarf is the size of Earth, but has more mass and that a teaspoon of its material could weigh more than a pick up truck. The white dwarf doesn't make any heat, and gradually cools down through billions of years. Sometimes white dwarfs can be found surrounded with a dusty disk of materials, debris, and planets.

This is the final stage in a low-mass star’s life.

This happens after stars cool down and there is no more nuclear fusion, and now the star doesn’t emit any light or heat. Even though Black dwarfs are a theoretical concept, it doesn’t mean they don’t exist, just that stars takes a long time to cool down—longer than the age of the universe—so we can’t directly observe them in the way we wish.

Stars with significantly more mass will become red supergiants.

They are so large that they start to fuse elements into iron, at which point it does not create enough energy that it takes to form it, making it expand and very quickly afterwards collapse and explode. Before they explode, they release excess gas from within them, leading to the increased brightness and luminosity of dying stars.

A supernova signifies the end of a red supergiant's reign.

A Red Supergiant turns into a Supernova when the force of gravity is greater than the force of fusion in the core, which causes the star to collapse and explode, leaving the core intact. They can reach a diameter of several light-years across.

A neutron star is the remains of the stellar explosion.

After the supernova, what remains is the core, which will collapse on itself, forming a superdense mass or a star with extremely high gravity. Being one meter above the surface would make a human accelerate 869 miles per second. In addition, neutron stars are half a million solar masses, but what's even more impressive is that they hold all that mass in a 12-mile diameter.

The black hole is most powerful object in the whole universe.

Black holes form after a supernova. Instead of being forming into giant stars like neutron stars, they are formed by supergiant and hypergiant stars and are very hard to see since they absorb all light. Black holes form when a star explodes and dies, but is so dense that all of the matter is pulled in and essentially collapses into itself, creating an extremely strong gravity field, from which not even light can escape.