Life cycle Of Stars

By Brennan Carson

The Cycle

The cycle is like a human growing up Here is a pic of how a star goes through its cycle First its just dust and gas. Then it gets pulled together to make a Proto star. The next Is the Main Sequence Then it grows in to a Red Giant then the final stage is White Dwarf.

How the stars were born

A star is born when atoms of light elements are squeezed under enough pressure for their nuclei to under go fusion. All stars are the result of a balance of forces: the force of gravity compresses atoms in interstellar gas until the fusion reactions begin.

The origin of elements

Approximately 73% of the mass of the visible universe is in the form of hydrogen. Helium makes up about 25% of the mass, and everything else represents only 2%. The low-mass elements, hydrogen and helium, were produced in the hot, dense conditions of the birth of the universe itself.

Main sequence

The main sequence is the first stage of the journey that a star goes through. the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell. Our sun Is currently in the main sequence

Red giant

This is the second stage of the star. The energy produced by the helium fusion causes the star to expand outward to many times its original size. Red giant stars reach sizes of 100 million to 1 billion kilometers in diameter (62 million to 621 million miles), 100 to 1,000 times the size of the sun

White Dwarf

This is the third and final stop for a star.
  1. White dwarfs are stars that have burned up all of the hydrogen they once used as nuclear fuel. Fusion in a star's core produces heat and outward pressure, but this pressure is kept in balance by the inward push of gravity generated by a star's mass.

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