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OURSUN
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The Sun is the star closest to Earth.
It provides the light, heat, and energyfor life.
Ancient people worshipped the Sun as alife-giving god.
Suns total energy output is enormous.
It is a rather ordinary star - notparticularly big or small, not particularly
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It is the source of heat controls ourclimate and weather.
It is the most studied star.
The Sun is thestar at the center of
the Solar System. It is almost perfectly spherical and
consists of hot plasma interwovenwith magnetic fields.
The Sun is a G-type main sequence starcomprising about 99.8632% of the total
mass of the Solar System
http://en.wikipedia.org/wiki/Starhttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Spherehttp://en.wikipedia.org/wiki/Plasma_(physics)http://en.wikipedia.org/wiki/Magnetic_fieldhttp://en.wikipedia.org/wiki/G-type_main_sequence_starhttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/G-type_main_sequence_starhttp://en.wikipedia.org/wiki/Magnetic_fieldhttp://en.wikipedia.org/wiki/Plasma_(physics)http://en.wikipedia.org/wiki/Spherehttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Star8/2/2019 Astronomy Sun Report Ko
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Chemically, about three quarters of theSun's mass consists ofhydrogen, whilethe rest is mostly helium. The rest of it(1.69%, 5,628 times the mass of Earth)
consists of heavier elements, includingoxygen, carbon ,neon, iron, and others.
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CHARACTERISTICSOUR OF SUN
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Size
The Sun is1,390,000 km in
diameter. Thatcompares with
12,756 km fordiameter of theEarth. In other
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Rotation
The Sun rotates on its axis in space,from west to east, as Earth does. Its
rotation is approximately the same axisthat most of the planets revolved aroundthe Sun. Since the Sun is primarily veryhot gas, the surface at the equator rotates
once every 25.4 days. The rotation nearthe poles is around 36 days. Also thesurface swirls in high and low pressureareas, similar to those that occur on Earth.
TemperatureIts temperature is extremely hot, with
the surface being about 5000 C and thecenter core at 15,600,000 C.
Radiation
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sunsetsunrise
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3/11/12Solar Flares
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Flares and coronal mass ejections
SOLAR FLARE
it is a sudden, tremendous, explosiveoutburst of light, invisible radiation and
material from the Sun one great solar flare may release as
much energy as the whole world uses in100,000 years.
Flares are short-lived, typically lasting afew minutes. The largest last a fewhours.
it seems to be energized by strong local
magnetic fields.
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CORONAL MASS EJECTION
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CORAL MASS EJECTION It the most energetic of all solar
eruptions.
It may include prominences.
Most ejections originate from activeregions on Sun's surface, such asgroupings ofsunspots associated withfrequent flares
It is a massive burst ofsolar wind.
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3/11/12Solar wind
It is a plasma, or steam of energetic,electrically charged particles that flowsout from the Sun at all times.
It is much faster, thinner, and hotter thanany wind on Earth.
It comes mainly from coronal holes,region in the suns corona where gasesare much less dense than elsewhere.
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3/11/12Solar wind
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CORE
RADIATIVE
ZONE
CONVECTIONZONE
PHOTOSPH
ERE
CHROMOSPHERE
CORONA
SUNSPOTS
GRANULES
PROMINENCE
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3/11/12Parts of the sun
1. CORE
is considered to extend from the center to about 0.2to 0.25 solar radius. It is the hottest part of the Sunand of the Solar System. It has a density of up to150 g/cm (150 times the density of liquid water)
and a temperature of close to 15,000,000 Kelvin (bycontrast, the surface of the Sun is close to 6,000Kelvin). The core is made of hot, dense gas in theplasmic state. The core, inside 0.24 solar radius,generates 99% of the fusion power of the Sun.
2. RADIATIVE ZONE
From about 0.25 to about 0.7 solar radii, solarmaterial is hot and dense enough that thermal radiation.
3. CONVECTION ZONE
is the range ofradii inwhich energy is transported
http://en.wikipedia.org/wiki/Solar_radiushttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Waterhttp://en.wikipedia.org/wiki/Kelvinhttp://en.wikipedia.org/wiki/Solar_radiushttp://en.wikipedia.org/wiki/Thermal_radiationhttp://en.wikipedia.org/wiki/Radiihttp://en.wikipedia.org/wiki/Convectionhttp://en.wikipedia.org/wiki/Radiihttp://en.wikipedia.org/wiki/Thermal_radiationhttp://en.wikipedia.org/wiki/Solar_radiushttp://en.wikipedia.org/wiki/Kelvinhttp://en.wikipedia.org/wiki/Waterhttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Solar_radius8/2/2019 Astronomy Sun Report Ko
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4. PHOTOSPHERE
is the region from which externallyreceived light originates.
5. CHROMOSPHERE
is the second of the three main layers inthe Sun's atmosphere and is roughly
2 000-kilometers deep. It sits just abovethe photosphere and just below thesolar transition region.
6. CORONA
is a type ofplasma of the Sun orother celestial body, extending millions ofkilometers into space, most easily seenduring a total solar eclipse, but also
observable in a coronagraph. The Latinroot of the word corona means crown.
http://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Solar_transition_regionhttp://en.wikipedia.org/wiki/Plasma_(physics)http://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Solar_eclipsehttp://en.wikipedia.org/wiki/Coronagraphhttp://en.wikipedia.org/wiki/Latin_languagehttp://en.wikipedia.org/wiki/Latin_languagehttp://en.wikipedia.org/wiki/Coronagraphhttp://en.wikipedia.org/wiki/Solar_eclipsehttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Plasma_(physics)http://en.wikipedia.org/wiki/Solar_transition_regionhttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Sun8/2/2019 Astronomy Sun Report Ko
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7. SUNSPOTS
are temporary phenomena on thephotosphere of the Sun that appear
visibly as dark spots compared tosurrounding regions.
8. GRANULES
on the photosphere of the Sun arecaused by convection currents ofplasma
within the Sun's convective zone.
9. PROMINENCE
is a large, bright feature extendingoutward from the Sun's surface, often ina loop shape. Prominences are anchoredto the Sun's surface in the photosphere,
and extend outwards into the Sun's corona. While the corona consists of extremely
http://en.wikipedia.org/wiki/Phenomenahttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Visible_spectrumhttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Convection_currenthttp://en.wikipedia.org/wiki/Plasma_(physics)http://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Coronal_loopshttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Coronahttp://en.wikipedia.org/wiki/Coronahttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Coronal_loopshttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Plasma_(physics)http://en.wikipedia.org/wiki/Convection_currenthttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Visible_spectrumhttp://en.wikipedia.org/wiki/Sunhttp://en.wikipedia.org/wiki/Photospherehttp://en.wikipedia.org/wiki/Phenomena8/2/2019 Astronomy Sun Report Ko
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3/11/12Sun spot cycle
A daily count of the number of sunspotsvisible on the Sun (the Wolf number orZurich sunspot number) shows a periodicvariation with maxima occuring (on
average) every 11 years. During a solarsunspot minima, there may be no spotsvisible on the Sun for several days, andthe number present during maxima varieswith each cycle. The maxima of 1958shows the highest sunspot activity onrecord.
From 1645-1715 there were very fewsunspots, even during the maxima. Thisis known as the Maunder Minimum, and
http://astronomy.swin.edu.au/cosmos/S/Sunhttp://astronomy.swin.edu.au/cosmos/W/Wolf+Numberhttp://astronomy.swin.edu.au/cosmos/Z/Zurich+Sunspot+Numberhttp://astronomy.swin.edu.au/cosmos/S/Sunhttp://astronomy.swin.edu.au/cosmos/S/Sunhttp://astronomy.swin.edu.au/cosmos/S/Sunhttp://astronomy.swin.edu.au/cosmos/P/Periodhttp://astronomy.swin.edu.au/cosmos/S/Sunhttp://astronomy.swin.edu.au/cosmos/S/Sunhttp://astronomy.swin.edu.au/cosmos/Z/Zurich+Sunspot+Numberhttp://astronomy.swin.edu.au/cosmos/W/Wolf+Numberhttp://astronomy.swin.edu.au/cosmos/S/Sun8/2/2019 Astronomy Sun Report Ko
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Reflecting telescope
A reflectingtelescope (also calleda reflector) is an
optical telescope which
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A refracting or refractortelescope is a type of
optical telescope that
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What are the importance of our SUN?
The Sun holds the nine planets in our Solar System.
The Sun is our supply of daylight.
The Sun is the main source of energy for earth.
The sunrays helps us by providing Vitamin D which isessential for our skin. Some people are seen basking inthe sunshine to get useful Vitamin D and get tanned as
well.Sunlight also helps to stop the growth of bacteria,insects and thus prevent the spread of diseases likemalaria, typhoid, etc .
Sun helps the plants in preparing their food through itslight by a process called as photosynthesis.
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Why do we need the SUN?The Sun is the prime source of the energy
that we get from the food that we eat.
What would happen if theSUN never existed?
If the sun never existed, nothing in thisworld could have existed either.
7 Thi Y Sh ld K
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7 Things You Should KnowAbout the Sun
1. The sun is by far the largest object in
the solar system.2. Our Sun is actually the closest star to
Earth.
3. Since its creation, the sun has used up
about half of the hydrogen in its core.
4. The Greeks named the sun Helios
5. Ulysses was the first spacecraft to
study our Sun's poles6. The sun's strong gravitational pull holds
Earth and the other planets in place
7. The sun is made up of distinctive areas.
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~THE
END~
(ilovemyself)
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