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The Sun I
The Sun as a model for stars and
astrophysics in general
Close-up of a G2 Main Sequence Star
The Solar Interior…the prime
application of the equations of stellar
structure
Density in the solar interior
Temperature in the Solar Interior
The “Faint Young Sun Paradox”
Tests of Stellar Interior Models
• Mass, luminosity, temperature of Sun and
stars
• Solar neutrinos
• Helioseismology (and asteroseismology)
Helioseismology: Eigenmodes of the Sun
Solar Neutrino Experiments
Layers of the Solar Atmosphere
• Photosphere
• Chromosphere
• Corona
Granules in
the Solar
Atmosphere
The Solar Spectrum and the
Photospheric Opacity Mechanism