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The Sun

The Sun. Classification of the sun. Class G Color Yellow Surface Temperature 5,000 – 6,000 ºC Elements hydrogen and helium Greek word for Sun is Helios. Structure of the sun. Atmosphere Corona Chromosphere Photosphere Interior Convective Zone Radiative zone Core. Corona.

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The Sun

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  1. The Sun

  2. Classification of the sun • Class G • Color Yellow • Surface Temperature 5,000 – 6,000 ºC • Elements hydrogen and helium • Greek word for Sun is Helios

  3. Structure of the sun • Atmosphere • Corona • Chromosphere • Photosphere • Interior • Convective Zone • Radiative zone • Core

  4. Corona • Sun’s outer atmosphere • Can extend outward 10 – 12 times distance of the suns diameter • Gases only visible during total solar eclipse • 1,699,726.85 Celcius

  5. Chromosphere • 3,000 km thick • Deep red in color • Only seen during solar eclipse • Element Helium was detected here in 1868 • 12,726.85 Celcius

  6. Photosphere • Visible portion we see • Gases thick to represent what we see as surface • 600 km thick • 5526.85 Celcius

  7. Convective zone • 200,000 km thick • Gases circulate in convection currents • YouTube - Solar Convection Currents

  8. Radiative Zone • Dense region 300,000 km thick • How far is it from Earth to the Moon? • Takes light millions of years to pass through • Atoms are densely packed

  9. Core • Center of Sun • Nuclear Fusion takes place here • Radius of core = 200,000 km • Temperature = 15,000,000

  10. Energy production in the sun • Initial belief = Burning • How can it burn for billions of years? • Second thought = Shrinking • Gravity causes sun to shrink releasing energy • E=MC² • Energy equals mass times the speed of light squared • Nuclear fusion= process of two nuclei combining

  11. Nuclear Fusion

  12. Features on the Sun • Sunspots • Prominence • Solar flares • Solar winds

  13. Solar Prominence

  14. Solar Flare

  15. Sunspots

  16. Solar Winds

  17. Aurora Borealis

  18. Size of our Star • YouTube - Planets and stars size in scale

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