Presentation on theme: "What is the fate of our sun and other stars?"— Presentation transcript:
1 What is the fate of our sun and other stars? The SunWhat is the fate of our sun and other stars?
2 The Sun’s Properties 99% of all mass in the solar system 330,000 times more massive than EarthInterior Temperature: 10,000,000KInner layer: mostly plasma
3 The Sun’s Atmosphere Photosphere Visible surface of the sun 400km thickAverage temp: 5800KLowest layer, but most light
4 The Sun’s Atmosphere Chromosphere Outside of photosphere 2500km thick Visible during solar eclipse
5 The Sun’s Atmosphere Corona Outermost layer of sun Low Density Dim, only seen in eclipseTemp: 1million K – 2million K
6 Solar Wind The corona does not have a true edge Gas flows out of the corona at high speedsForms the Solar WindReaches speeds of 400km/sCauses Auroras
7 Solar Activity Sunspots Dark spots on surface of photosphere Appear darker because they are coolerMagnetic Field pokes throughHot gases can’t rise
8 Solar Activity Cycles every 22.4 years Maximum sunspots every 11.2 yearsMagnetic field reverses
9 Other Solar Features Coronal Holes Solar Flares Prominence Low density Solar Wind EscapesSolar FlaresEruptions of particles and radiationProminenceArc of gas ejected from chromosphere
10 Solar Energy The sun produces energy largely from Fusion Fusion – combination of hydrogen atoms to make heliumEnergy is produced in core of sunEnergy near the core is transported through a radiation zone (86%)Near the surface energy is transported through convection currents
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