Earth/Space/Physics Kristy Halteman http://www.lesia.obspm.fr/~bonnin/fichiers/images/sun-soho011905-1919z.jpg
A. Properties 1. 330,000 times more massive than the Earth. http://www.37signals.com/svn/images/sun_v_planets.jpg
http://apod.nasa.gov/apod/ap060807.html
Properties cont. 2. It contains about 99% of all the mass in the solar system. 3. It is 4.5 billion years old 4. It s gravity controls the motion of planets.
Properties cont. 4. Made of mostly H. http://ircamera.as.arizona.edu/natsci102/lectures/sun.htm
Properties cont. 5. Is in the main-sequence stage so H He fusion is taking place. http://www.hpwt.de/kernfan.gif
B. The Sun s Inner Layers http://www.lesia.obspm.fr/~bonnin/fichiers/images/sun-soho011905-1919z.jpg
1.Core a. Center layer of the sun. b. Where all the sun s heat & light is made http://images.google.fr/imgres?imgurl=http://media.nasaexplores.com/lessons/05-102/images/sun.jpg&imgrefurl=http://www.nasaexplores.com/show_k4_student_st.php%3fid%3d05 0131101742&h=348&w=362&sz=19&hl=fr&start=14&tbnid=6f0WtAjTHEnq0M:&tbnh=116&tbnw=12 1&prev=/images%3Fq%3Dlayers%2Bof%2Bthe%2Bsun%26gbv%3D2%26svnum%3D10%26hl%3D fr
2. Radiative Zone a. Heat & light move from the core into this layer http://images.google.fr/imgres?imgurl=http://media.nasaexplores.com/lessons/05-102/images/sun.jpg&imgrefurl=http://www.nasaexplores.com/show_k4_student_st.php%3fid%3d050131101742&h=348&w=362&sz=19&hl=fr& start=14&tbnid=6f0wtajthenq0m:&tbnh=116&tbnw=121&prev=/images%3fq%3dlayers%2bof%2bthe%2bsun%26gbv%3d2%26svnum%3d1 0%26hl%3Dfr
3. Convection Zone a. In this layer, gases move like boiling water. b. This moves them from the inner parts of the sun to the outer part we can see. http://images.google.fr/imgres?imgurl=http:// media.nasaexplores.com/lessons/05-102/images/sun.jpg&imgrefurl=http://www.n asaexplores.com/show_k4_student_st.php% 3Fid%3D050131101742&h=348&w=362&sz =19&hl=fr&start=14&tbnid=6f0WtAjTHEnq0 M:&tbnh=116&tbnw=121&prev=/images%3F q%3dlayers%2bof%2bthe%2bsun%26gbv %3D2%26svnum%3D10%26hl%3Dfr
C. The Sun s Atmosphere http://www.lesia.obspm.fr/~bonnin/fichiers/images/sun-soho011905-1919z.jpg
1. Photosphere a. The visible surface of the sun where most of its visible light comes from b. The lowest layer c. Avg. temp = 5800 K
2. Chromosphere a. Temp 30,000 K b. Visible only during a solar eclipse when the photosphere is blocked. c. Appears red http://www.windows.ucar.edu/tour/link=/sun/solar_i nterior/solar_furnace.html
3. Corona a. Outermost layer b. Extends several million km from the top of the chromosphere. c. Temp 1-2 million K d. Low density e. Can only be seen when the photosphere is blocked. http://www.webdesign.org/img_articles/3612/sun15.jpg
http://casswww.ucsd.edu/public/tutorial/s un.html
Radiative Zone Core Corona Convection Zone Photosphere http://images.google.fr/imgres?imgurl=http://media.nasaexplores.com/lessons/05-102/images/sun.jpg&imgrefurl=http://www.nasaexplores.com/show_k4_student_st.php%3fid%3d05 0131101742&h=348&w=362&sz=19&hl=fr&start=14&tbnid=6f0WtAjTHEnq0M:&tbnh=116&tbnw=12 1&prev=/images%3Fq%3Dlayers%2Bof%2Bthe%2Bsun%26gbv%3D2%26svnum%3D10%26hl%3D fr Chromosphere
D. Solar Activity http://www.lesia.obspm.fr/~bonnin/fichiers/images/sun-soho011905-1919z.jpg
1. Sunspotsa. Dark spots on the surface of the photosphere. b. Are located in regions where the sun s magnetic fields poke through the photosphere. c. Last 2 months
d. Sunspots occur in pairs http://ircamera.as.arizona.edu/natsci102/lectur es/sun.htm
http://www.norcalblogs.com/watts/images/sunprespective1.jpg
2. Solar Activity Cycle a. Number of sun spots change, on average, every 11.2 years
3. Solar Flares- Violent eruptions of particles & radiation from the corona and chromosphere http://www.redorbit.com/education/reference_library/solar_system/sol ar_flare/157/index.html
4. Solar Prominence a. Large bright feature extending outward from the sun's surface, often in a loop b. They extend from the photosphere to the corona http://ircamera.as.arizona.edu/natsci102/lectures/sun.htm
Sun Video with quiz after
E. Aurora borealis 1. Called the northern lights, because only visible in the North sky from the Northern hemisphere. (Aurora australis in southern hemisphere) 2. Most often occurs from Sept-Oct and from March-April. 3. Caused by solar wind colliding with atoms in the upper atmosphere. Energy from the collision is released in the form of light. 4. Most colors are green & red from O. Some red & blue are caused by collision with N.
http://www.af.mil/weekinphotos/wipgallery.asp?week=97&idx=9
http://en.wikipedia.org/wiki/image:red_and_green_aurora.jpg#file