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Star Cycle

{Vocab.}

TermDefinition
Life Cycle of a Star The sequence of changes that occur in a star as it ages.
Interstellar Medium A thinly spread out area of gas and dust.
Nebula interstellar medium begins to collect into big clouds.
Protostar Inside the nebula are regions of greater and lesser gravity, causing the gas and dust to pull together.
Equilibrium A battle between gravity and gas pressure.
Star An extremely hot ball of gas, with Hydrogen {H2} fusing into Helium {He} at it's core.
Main Sequence Stars live out most of their lives in this phase. Stars have achieved nuclear fusion.
Red Giant The phase after the main phase. outer gas layers of the star expand. As the star uses all it's fuel it's core shrinks.
Planetary Nebula Occurs at the end of a low-mass red giant. The outer layer of the star is expelled.
White Dwarf Forms when a low-mass star runs out of fuel. The core is planetary nebula.
Black Dwarf Never seen. End project of an white dwarf.
Red Super Giants Same thing as a giant star only much bigger.
Supernova Last stage of a massive stars life.
Neutron Star The core left behind after a supernova.
Black Hole Forms when very massive stars collapse at the end of their life cycle.
Created by: melanyd
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