Our Sun The Star

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'Our Sun - The Star'
By Brialee Richardson
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Information about our sun
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Convective zone
Chromosphere
Interface zone
Photosphere
Radioactive zone
Core
Prominence
Sunspot
Corona
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Structure of our sun
THE CORE
The centre of the sun. Suns light and heat are
made here through a process called nuclear
fusion. E MC²
RADIOACTIVE ZONE
Thick layer of cooler gas that surrounds the core.
CONVECTIVE ZONE
Second layer of gases surrounding the core.
Contains large cells of moving gas that carry
heat and light.
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PHOTOSPHERE
The surface of the sun. Layer of hot gases.
CHROMOSPHERE
The suns inner atmosphere above the photosphere.
CORONA
This is the outer most region of the sun. Extends
far into space.
SUNSPOTS
Cooler areas of the photosphere. Appear as small
dark spots on the suns surface.
PLAGES AND PROMINENCES
Plages are hotter areas of the photosphere.
Prominences are columns of gas exploding into
space due to the suns magnetic field.
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NUCLEAR FUSION
The suns energy (heat and light) are made by
this process.
In the suns hydrogen atoms exist as just a
mixture of protons and electrons. These particles
often collide with each other.
Protons sticking together form the centre of the
element helium. This is nuclear fusion.
Every second 4 000 000 tonnes of matter is
converted into energy.
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Formation of our sun
Most scientists believe the sun formed about 5
billion years ago. It began as a cloud of dust
and gas called a nebula. Dust and gas fell to
the centre of the nebula, a nearby star exploded
and dust and gas compressed. Gravity created much
pressure, it began to get hot. After a long time
fusion began because of extreme temperatures.
Fusion made the sun glow.
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Life cycle of more bigger stars
In the sun, eventually the hydrogen will run
out. It will swell into a red giant, cool and
contract into a white dwarf and as light fades
completely become a black dwarf. Bigger stars as
they become a white dwarf start to glow brightly
again, undergoing more fusion. They will expand
and contract forming heavier elements in nuclear
reactions and explode into a supernova. It throws
out dust and gas leaving a dense core called a
neutron star and a star will form.