Life Cycle Of A Star

By Aaron Le

Star Life Cycle and Human Life Cycle

1. Early Stage/Developmental Stage: Protostar and Fetus

2. Learning Stage: Main Sequence and Infancy Through Childhood

3. Working Stage: Red Giant/Super Giant and Middle Age

4. Retire/Death Stage: White Dwarf/Black Hole and Old Age-Death

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Interstellar Medium

Interstellar Medium: It is the material that fills in spaces between the stars. It is located in space, everywhere basically. It comprises of mostly space gas and some space dust.
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Protostar

Protostar: This stage primarily consists of hydrogen and a little helium. It will begin hydrogen fusion when it turns into a main sequence star.

Equilibrium: This is a star's main goal, stability between gas pressure pushing out from center and gravity pulling in towards center.
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Main Sequence

Main Sequence: Fusing hydrogen atoms into helium atoms is what happens during this stage. The lifespan is determined by the size of the star. After the main sequence, the processes could either stop due to no hydrogen or substitute helium in rather than hydrogen.

Fusion: Two things conjoining together to make something bigger.
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Red Giant/Super Giant

Red Giant/Super Giant: Helium fusing into carbon is the process and these are the elements in this phase. Temperature increases, luminosity goes more towards the red side of the spectrum due to the temp and red giants have the highest volume among most stars.
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White Dwarf/Black Hole/Death

White Dwarf/Black Hole/Death: A star dies when it has run out of elements that can act as fuel. Most stars can either fade into nothingness or attract other things in its binary system.
Supernova: Massive stars that don't turn into white dwarfs end up as a violent supernova explosion.

Planetary Nebula: Lower-medium stars that shed their outer layers into rings known as the planetary nebula.

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Spectroscopy

Spectroscopy: A star's light tells us about the gases that are present within the given star. For example, purple, blue and red lights only can be recognized as hydrogen.

Red and Blue Shifts: When objects in space such as stars or galaxies move closer or further away. Further away results in a red shift while closer results in a blue shift.

Doppler Effect: A star's light also emanates in wavelengths, this means that the wave can crush together or stretch apart depending on relative location of the object.

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Origins of the Elements

Origins of the Elements: The first elements came from the Big Bang and future elements popped up from processes with the originals.

Hydrogen: Born from the Big Bang.

Helium: Fuses into Nitrogen and Oxygen from Hydrogen.

Iron: Silicon fuses with other things to make things such as iron or heavier than it.

Bibliography

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