SunStarsGalaxiesclick for 6/page to printMidterm Exam• The in-class activities are posted on webpage and online.wou.edu—study them for the exam.• A study guide, answers to review questions, and last year’s exam are posted on line also• Bring a scantron and a pencilSunPhoto of Sun’s granular surfaceDetail of SunspotGroup of SunspotsSunspot Variation over timeSpicules of the ChromosphereSolar CoronaSolar wind blows comet tailshttp://www.astro.uva.nl/demo/sun/inter.htmSolar Prominencehttp://antwrp.gsfc.nasa.gov/apod/image/0109/sunplume_soho_big.gifVideo clip http://antwrp.gsfc.nasa.gov/apod/ap030223.htmlAnother video clip http://spacescience.com/headlines/images/prominence/prominence_10jan00.movAurorasAurora photo from Skylabhttp://www.astro.uva.nl/demo/sun/aarde.htmSurface Detail of SunSolar Interior• Nuclear Fusion of 4 Hydrogen to 1 Helium• Difference in atomic mass is released as energy• Released as photons—light particles• Convection brings photons to photosphere• Sun will last about another 5 billion yearsStructure of SunSun now and laterThis page was copied from Nick Strobel's Astronomy Notes. Go to his site at www.astronomynotes.com for the updated and corrected versionRed Giant BetelgeuseThis page was copied from Nick Strobel's Astronomy Notes. Go to his site at www.astronomynotes.com for the updated and corrected versionNebula—eventual Sunhttp://www.astro.uva.nl/demo/sun/leven.htmMain Sequence to Red Giant to White Dwarfhttp://imagine.gsfc.nasa.gov/docs/science/know_l2/dwarfs.htmlBeyond Our Solar SystemEarth Science 11thed.Pages 660-680Lagoon NebulaStellar ParallaxStellar ParallaxOriginal PhotoSix months laterStellar ParallaxParallax angle• 1 second of arc = 1/3600 of a degree• Closest star is 4.3 light years away• Light year is not a time period, it is a distance– How far light travels in a year– 9.5 trillion kilometers– 5.8 trillion milesStar Colors (time lapse photo)Equal Mass StarsOne is twice mass of otherStar temperature vs. magnitudePulsating magnitudeNova HerculisNova PerseiOrion NebulaPleiades star cluster has reflection nebulaHorsehead NebulaDark nebula in OrionCloseup of Horsehead NebulaProtostars at base of head• http://www.noao.edu/image_gallery/html/im0057.htmlSpace Telescopes• http://www.spitzer.caltech.edu/about/greatobs.shtmlMilky Way• Spiral• 200 billion stars• Black hole in center• Older stars in center, younger at edgesMilky Way profileGreat Galaxy in AndromedaTypical spiral galaxiesEdge-on spiral galaxySpiral galaxiesBarred spiral galaxyCluster of galaxiesRaisin bread analogy of the expanding universeMilky Way
View Full Document
Unlocking...