Astronomy Sun Report Ko

8/2/2019 Astronomy Sun Report Ko

1/28

Click to edit Master subtitle style

3/11/12

OURSUN


2/28

3/11/12

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
http://imagine.gsfc.nasa.gov/docs/dict_qz.htmlhttp://imagine.gsfc.nasa.gov/docs/dict_qz.html


3/28

3/11/12

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/Star


4/28

3/11/12

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.
http://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Solar_Systemhttp://en.wikipedia.org/wiki/Hydrogenhttp://en.wikipedia.org/wiki/Heliumhttp://en.wikipedia.org/wiki/Oxygenhttp://en.wikipedia.org/wiki/Carbonhttp://en.wikipedia.org/wiki/Neonhttp://en.wikipedia.org/wiki/Ironhttp://en.wikipedia.org/wiki/Ironhttp://en.wikipedia.org/wiki/Neonhttp://en.wikipedia.org/wiki/Carbonhttp://en.wikipedia.org/wiki/Oxygenhttp://en.wikipedia.org/wiki/Heliumhttp://en.wikipedia.org/wiki/Hydrogen


5/28

3/11/12

CHARACTERISTICSOUR OF SUN


6/28

3/11/12

Size

The Sun is1,390,000 km in

diameter. Thatcompares with

12,756 km fordiameter of theEarth. In other


7/28

3/11/12

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


8/28

3/11/12

sunsetsunrise


9/28

3/11/12Solar Flares


10/28

3/11/12

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.


11/28

3/11/12

CORONAL MASS EJECTION


12/28

3/11/12

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.
http://en.wikipedia.org/wiki/Sunspothttp://en.wikipedia.org/wiki/Solar_windhttp://en.wikipedia.org/wiki/Solar_windhttp://en.wikipedia.org/wiki/Sunspot


13/28

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.


14/28

3/11/12Solar wind


15/28

3/11/12

CORE

RADIATIVE

ZONE

CONVECTIONZONE

PHOTOSPH

ERE

CHROMOSPHERE

CORONA

SUNSPOTS

GRANULES

PROMINENCE


16/28

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_radius


17/28

3/11/12

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/Sun


18/28

3/11/12

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/Phenomena


19/28

3/11/12


20/28

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/Sun


21/28

3/11/12Sunspot cycle


22/28

3/11/12


23/28

3/11/12

Reflecting telescope

A reflectingtelescope (also calleda reflector) is an

optical telescope which
http://en.wikipedia.org/wiki/Optical_telescopehttp://en.wikipedia.org/wiki/Optical_telescope


24/28

3/11/12Refracting telescope

A refracting or refractortelescope is a type of

optical telescope that
http://en.wikipedia.org/wiki/Optical_telescopehttp://en.wikipedia.org/wiki/Lens_(optics)http://en.wikipedia.org/wiki/Optical_telescope


25/28

3/11/12

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.


26/28

3/11/12

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


27/28

3/11/12

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.


28/28

3/11/12

~THE

END~

(ilovemyself)

Documents

Astronomy Sun Report Ko