Download Life Cycle Of A Star

Life Cycle Of A Star
By Miharu Furuta
Introduction
In the night we see things we know as stars, but they’re not simple, they’re life
is very complex and has lots of stages. A star is a large sphere of hot gas
that produces heat and light. There are many stars in our galaxy, and many
more in others, but the star that is the most important and the one that we
orbit around is called the Sun. The Sun produces heat and light for us and
is also keeping all the planets in orbit. Stars aren’t just beautiful things
shining in the night, they are also very important and complex.
Nebula
A nebula is a cloud of hydrogen, chemicals and dust from
space. It’s the first stage of a stars life. The birth of a star
starts at a point when the nebula collapses under it’s
own gravity and gas pressure and goes into nuclear
fusion, later turning into a star.
http://www.makeu
pgeek.com/commu
nitychallenge/nebulainspired-monthlychallenge/
Star
The star is born from the nebula and now a sphere of hydrogen
and helium. It’s surface temprature can range from around
45,00 kelvin- 40,000 kelvin. It produces heat and light, and it’s
surface temprature ranges from around. Soon from this stage, it
will turn into a red giant.
Red Giant
http://www.overc
lock.net/lists/disp
lay/view/id/5501
707
A red giant is large and very bright star with a cool surface
temprature as low as 3500 kelvin, it is also referred to
as a super giant and is 1000 times more voluminous
than our sun.
A star is transformed into a red giant when all the
hydrogen in the core is consumed and the outer layers
of the star start to expand 100 times it’s original size.
White Dwarf
A white dwarf is a small and hot star, and the last stage in the
life of a star. It’s temprature is around 10,000 Kelvin to
30,000 Kelvin. A white dwarf is also the remains of a
shrunken star.
A red giant turns into a white dwarf when all the elements are
burned out and it runs out of fuel. The star’s outer layers
start to burn away, making the star smaller and heat packs
in.
http://cronodon.
com/SpaceTech/
WhiteDwarf.html
Supernova
A supernova is the explosive end of a stars life and is amazingly bright
for a few breif moments.
A change in the core of a star, it can happen two ways and either way it
results in a supernova.
The first way is in binary star systems where gas from a star falls onto a
white dwarf and holding too much matter,causing it to explode.
The second way is when a star’s life ends, as the star runs out of nuclear
http://www.mpafuel, some of it’s mass flows into it’s core. Soon the core will be too
garching.mpg.de/mpa/in
heavy, resulting in a supernova.
stitute/news_archives/ne
ws1005_janka/news1005
_janka-en.html
Neutron Stars
A neutron star is made mainly of neutrons and are
produced when a supernova explodes. A neutron
star is highly dense and has a mass of 20km.
If it’s mass gets any larger, it’s gravity will be so strong
that it will suck itself in to become a black hole.
http://thefutureofth
ings.com/5879magnetic-neutronstar/
Black Holes
Black holes are known as one of the results of a supernova and the end of a stars
life. The density and gravitational pull is so strong that nothing can escape it,
even light.
A black hole is formed when a supernova happens, all it’s mass is squeezed into
the black hole, creating it’s massive density and gravitational. It could also be
formed from a neutron star, but not likely, usually after a neutron star is
formed it’s lost it’s chance to become a black hole, unless a large amount of
mass attacks the star and creates a black hole.
Black Dwarf
A black dwarf is a white dwarf that has cooled down and is hard
to spot. Unlike other dwarfs, a black dwarf is completley
hypothetical.
Aside from the black dwarf there are no other stages after that
have been researched.
Original Diagram
Global Importance
Most stars aren’t that important to our world, but there is one,
the sun, that is excessivley important. It provides heat, light,
and orbit for us, and without that, the human race would die
out. Without orbit, all the planets would go out of orbit and
would spread chaos.
Threats
There are no threats to a stars life cycle. Unless there was
something that was invincible and could somehow can’t be
melted under the extreme heat of the stars, there is nothing.
Thoughts and Learned
During this project I learned a lot about stars and how important our
sun is. I also learned more about the life cycle of a star, since I
thought there were only 3 stages before.
My thoughts on this project is that, the life cycle of a star isn’t
something many people think about often. But it’s very important
and stars aren’t just pretty things in the night sky, they serve a
purpose as well.
Thank You