Life Cycle of a Star
By Isaac Jay Braun
A Star has many part of its life.
A star has 8 possible cycles of its life. These phases are Nebula, Star, Red Giant, Planetary Nebula,White Dwarf, Super Nova, Neutron Stars and Black Holes
What is Interstellar Medium?
Interstellar medium is the stuff that fills up space between stars. Its made of Helium, Interstellar Dust, Hydrogen and Interstellar Gas
What Is Equilibrium?
Equilibrium is a state of rest or balance due to equal of opposing forces. These forces are gravity and gas. Gravity pushes inward and Gas pressure pushes outward
Nebula
Nebula is the first cycle of a star's life. A nebula is a gas cloud made of Hydrogen and dust.
Main Sequence
Main Sequence is the second phase of a stars life. During this part the star is burning helium and after all of the helium is gone the star's life starts to end. A stars life is determined on its mass or size. During this phase nuclear fusion is happing. This fusion is hydrogen and neutrons combining together to make neutrons.
Red Giant
This is the third and the last phase of a star's life before it dies. During this phase the star's outer shell starts to expand and cool. Because the temperature is going down the luminosity of the star increases. The star become huge.
Super Nova and Planetary Nebula
A Super Nova is one of the ways a star can die. A Super Nova starts because a big star dies. A Super Nova is a gigantic explosion that releases tons of energy. A Planetary Nebula is a big gas clouds from a star releasing its outer layers.
White Dwarf and Neutron Star
White Dwarfs are about the size of a sun and are composed of electron-degenerate matter. A Neutron star is remnant of a star that is composed of packed Neutrons.
Black Hole
A Black whole a place where a gravitational field is so intense that no radiation or matter can escape.
Star's Light
A star's light can reveal its composition and this is called spectroscopy. There is also Blue/Red Shifted wavelengths. When a star is Blue/Red Shifted this means that is could be moving aways or moving towards us. This is an example of the Doppler Effect.
Our Elements
Our elements can come from cosmic processes such as the Big Bang, Super Novas, small stars and Large Stars.
Sources
http://www.seasky.org/celestial-objects/assets/images/starlife.jpg
http://helios.augustana.edu/~lc/sunxray.gif
http://upload.wikimedia.org/wikipedia/commons/d/d4/Keplers_supernova.jpg
http://www.space.com/images/i/000/000/223/original/black-hole-100317-02.jpg?1384370981
http://scienceblogs.com/startswithabang/files/2009/11/xray_neutronstar.jpg