The Sun Diameter is 110 times Earth’s Mass is 745 times Earth’s Its volume could hold 1 million...
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Transcript of The Sun Diameter is 110 times Earth’s Mass is 745 times Earth’s Its volume could hold 1 million...
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The Sun
Diameter is 110 times Earth’s Mass is 745 times Earth’s Its volume could hold 1 million Earths At the speed of sound, it would take 10 years to get
there (1,238 km/hr). It takes light 8.5 minutes to get here 5,500 to 15,000,000 degrees Celcius
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The Photosphere The innermost layer of the atmosphere
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Granulation Photosphere is made of millions of
cells called granules Each one is about 1,500 km
across, with a bright middle and dark edges.
Hot gas rises in the middle, and then gets pushed to the side where it cools.
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The Chromosphere The glowing red hydrogen gas that surrounds the
photosphere.
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The Corona Is made of positive hydrogen atoms and
surrounds the chromosphere Surrounds the sun at around 1 million km Only visible during eclipses
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SOLAR EVENTS
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Sunspots
Occur in pairs of opposite charge
They are visible due to increased electric/magnetic.
Occur in cycles
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Solar Prominences Clouds of gas from the
chromosphere that extend beyond the sun.
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Solar Wind The constant stream of electrically charged hydrogen
atoms the corona is releasing in all directions
When these interact with Earth’s magnetic field, auroras appear.
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Solar Flares and Coronal Holes
Solar Flares: outbursts of light in areas of sunspot activity.
Caused by the release of built up magnetic energy Release huge amounts of solar wind and
cause coronal holes Coronal Holes: tears in the corona that
release huge amounts of solar wind
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Magnetic Storms These occur when the earth gets an excess of solar
wind Due to coronal holes and solar flares They cause more auroras, inaccurate compass
readings, disrupted telephone and radio signals.
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Directions – Sun Quiz Take out a sheet of paper You May NOT use your notes! You Do NOT have to write the question. Answer in complete sentences.
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Sun Quiz – Answer In Complete Sentences
1. Draw and label the structure of the sun.
2. What are sunspots?
3. What solar events do sunspots cause? Which of these events can cause the release of solar wind?
4. Explain why granules appear bright in the middle but dark on the edges.
5. Explain how magnetic storms can affect the earth.