Chapter_14___The_Sun_summary

Chapter_14___The_Sun_summary - Chapter Summaries Chapter 14...

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Chapter Summaries Chapter 14: Our Sun 1. Sun is ionized gas (charged particles) Sun’s core temp is 15 Million K and surface temp is 5800 K Sun is made of : Hydrogen (90%), Helium (9%), metals(1%) Sun is 1 AU from Earth Sun’s energy comes from nuclear power, not coal, not wood, not gravitational contraction (Kelvin – Helmholtz), not impacts from comets and/or meteorites 2. Four Fundamental Forces of Nature: Gravity (depends on M/r 2 , infinitely long range force) Electromagnetism (long range force, carried by photons) Weak Nuclear Force (very short range : radius of atom) Strong Nuclear Force (extremely short range: radius of nucleus) 3. Solar Structure Solar Feature core coronal holes radiative zone flares convective zone spicules photosphere prominences chromosphere (transition zone) corona solar wind 4. Nuclear Fusion gravitational equilibrium : Gravity = force of radiation from fusion (book refers to this as pressure) gravity = pressure Mass atoms
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This note was uploaded on 09/08/2010 for the course ASTR 101 at San Jose State.

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Chapter_14___The_Sun_summary - Chapter Summaries Chapter 14...

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