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OUR SUN

Dive into the fascinating world of our Sun, from its formation in a solar nebula to the core's hydrogen fusion process. Discover the solar structure, including the photosphere, chromosphere, corona, and solar flares. Explore solar phenomena like sunspots, prominences, and the solar wind. Learn about the Sun's impact on Earth, including solar storms and the mesmerizing auroras. Unveil the mysteries of the Sun with this comprehensive guide.

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OUR SUN

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  1. OUR SUN

  2. OUR SUN Solar Nebula: - Cloud of gas and dust that developed into the solar system. - Our Sun was developed as a star from the burning of Hydrogen gas. Nebular Theory - Accepted idea that the sun and the planets condensed out of a spinning cloud of gas and dust.

  3. OUR SUN WORK ON: - Objectives 4.02 + 4.03 - Begins on page 571 of your book

  4. asdf

  5. OUR SUN

  6. Core • Hydrogen fusion • H + H → He + energy

  7. Radiative Zone • Energy travels outward from core along electromagnetic (EM) radiation • R-M-I-V-U-X-G • “Random walk” of photons

  8. CONVECTIVE ZONE • Convection currents • Hot gases rise to surface, cooler gases sink

  9. Photosphere • Solar surface • Granular texture • Sunspots appear Granulation Clip

  10. Chromosphere • Solar atmosphere • Solar storm activity observed

  11. Chromosphere

  12. CORONA • “Crown” • Seen only during solar eclipses • Heated by magnetic field • Solar wind

  13. The SUN Explained (further) • Please take out your SUN Objective notes

  14. Atomic Structure of Sun’s Core • Hydrogen Atoms (H) splitting to Helium (He) Atoms • Causes a great amount of energy • See 5 step process in book page 572

  15. 5-step process of Nuclear Fusion

  16. Sunspots • Cool, dark areas of gas within the photosphere. • Caused by powerful magnetic fields. • Slows down convection currents to the Photosphere, causing a cooling of certain areas of the surface.

  17. Solar Prominence: - Cloud of glowing gases that arches high above sun’s surface.

  18. Granulation • caused by the convection, or `bubbling' of the sun.

  19. Solar wind • Ions are so hot, gravity can’t hold them onto the sun

  20. Solar flare • Violent eruptions of plasma and EM photons

  21. Solar Flare

  22. Coronal Mass Ejection • Massive burst of Solar Wind (above the Corona) being released into Space.

  23. Solar Storms and Aurora’s on Earth

  24. AURORAS(Northern lights)

  25. Aurora Borealis Northwest Territories, Canada

  26. FINLAND (OCT 1, 2001) MENOMINEE, MI (OCT 11,2001)

  27. Aurora over Lake Superior

  28. U.P. Last Night

  29. AURORA BOREALIS

  30. So what’s the relationship? Michigan

  31. So what’s the relationship? Solar Activity Solar activity gets ejected from the sun, Solar Winds carry them through space (towards Earth and other planets), Earth’s Magnetosphere protects the earth by diverting solar winds to the North + South poles, as a result we see Aurora’s (Northern/Southern Lights) Aurora

  32. DAILY SOLAR FORECASTS

  33. Describe the Sunspot cycle • Sunspot (Solar Cycle) • 11 Year cycle • Max to Max (min to min) = 11 years • Last Max = 2008 • Influences solar activity heading towards Earth (more Aurora’s)

  34. Go to your LAB GROUPS • Sun Review • Use p. 571 of your book for help.

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