Today

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• Today
• DUE Project Proposals
• Star Types
• Thursday
• Life and Death of Stars
• READ Chapter 5
• Next Tuesday (2/24)
• Catch Up/Wrap Up Review for TEST 2
• Intro Planets
• READ Chapter 9
• Next Thursday (2/26)
• TEST 2
• Impacts

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UCORE

• Paid 10 week summer research experience
• 3,500 room
• http//www.uoregon.edu/msiuo/undergrad/ucore/ucor
  e.html
• Applications DUE 2/27/09
• FOR MORE INFO
• Margie Fyfield 7-202

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• Internal Structure of Sun
• Energy Transport within Sun
• Surface of the Sun
• Solar Atmosphere
• Sunspots
• Solar Storms

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The visible surface of the Sun-The Photosphere
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Atmosphere of the Sun

• Chromosphere
• Corona

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The Chromosphereduring eclipse (Fig. 3-8)
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Fig. 7-1a, p. 112
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Chromosphere(Fig. 7-4)
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Photosphere vs. Chromosphere(Fig. 7-5)
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Corona
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Fig. 7-5
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Fig. 7-5c, p. 115
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Fig. 7-3, p. 114
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Structure of the Sun
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http//sohowww.nascom.nasa.gov/gallery/images/larg
e/tricomp_prev.jpg
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Solar Max 2000-2002
http//www.solcomhouse.com/solarmax.htm
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Sunspots
Fig. 7-7, p. 117
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Tracking Rotation with Sun Spots
Fig. 7-12a, p. 121
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Fig. 7-8b, p. 118
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Sun Spots

• Often Occur as Pairs
• Size of Earth
• Dark because they are cool

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Sunspot Numbers Vary
Fig. 7-9a, p. 118
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As Does their Position
Fig. 7-9b, p. 118
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Solar Storms

• Todays Space Weather
• Flares
• Prominences
• Coronal Ejections
• Solar Wind

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Flare
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Solar Tsunami
Source http//apod.nasa.gov/apod/ap061213.html
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Prominence
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Coronal Hole
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Coronal Mass Ejections
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Coronal Mass Ejection
Source http//antwrp.gsfc.nasa.gov/apod/ap070206.
html
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The Aurora
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Light and Matter

• Bulk Matter
• Individual Atoms

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Light and Matter

• Solids
• Atoms

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Structure of Atoms
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Atoms Selectively Interact with Light
Fig. 6-5, p. 96
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Fig. 6-4, p. 96
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Atoms Light
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p. 99
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p. 99
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p. 100
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Types of Spectra

• Continuous
• Emission
• Absorption

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Solar Spectrum
Source http//www.astron.pref.gunma.jp/e/instrume
nts.html
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Identifying Elements in the Sun
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Detailed Solar Spectrum
Source http//www.noao.edu/image_gallery/html/im0
600.htm l
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Classifying Stars
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Not All Stars Have the Same Spectra
Source http//sci.esa.int/science-e/www/object/i
ndex.cfm?fobjectid35616fbodylongid1667
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Stellar Spectra
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Table 6-1, p. 103
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For Thursday 2/14

• Classifying Stars
• Star Lives
• READ Chapter 5