Life cycle Of a Star

How it compares to the life of a human

Birth, Life, Death

A star goes through many stages of life, much alike a human's life. Before a star is born it is a proto star, Before a human is born it is a fetus. Next, Infancy through adulthood is when the star is in the Fusion Ignition stage. Second to last is middle age, Red giant or Super Giant. Last is death, white dwarf or black hole.

Proto Star

This is after the birth of a star, but before the star has reached equilibrium. Equilibrium is when, the star finds balance between the outward pushing force Pressure and the inward pushing force gravity.

Main Sequence

The Main sequence is when the star is fusing it's hydrogen atoms into helium atoms. Fusion is when Two atoms combine to make another atom. An example of fusion is two Hydrogen atoms combining to form a Helium atom.

Red Giant

The red giant stage is when the star's stores of hydrogen and helium run out. The star starts to fuse heavier elements, ending in iron.


Supernovae is the explosive death of a star. When a supernova is over, usually a neutron star is left or a black hole is formed. The matter that is scattered from the supernova forms a nebula, making new stars.

Death Continued

The death of a star can also end in a White Dwarf. White dwarfs are the shrunken remains of red giants. These are usually very small and very hot.


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