| h2. Sun Facts |
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| h2. !270px-Sun920607.jpg! |
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| * [1 Overview|http://en.wikipedia.org/wiki/Sun#Overview] |
| * [2 Life cycle|http://en.wikipedia.org/wiki/Sun#Life_cycle] |
| * [3 Structure|http://en.wikipedia.org/wiki/Sun#Structure] |
| ** [3.1 Core|http://en.wikipedia.org/wiki/Sun#Core] |
| ** [3.2 Radiation zone|http://en.wikipedia.org/wiki/Sun#Radiation_zone] |
| ** [3.3 Convection zone|http://en.wikipedia.org/wiki/Sun#Convection_zone] |
| ** [3.4 Photosphere|http://en.wikipedia.org/wiki/Sun#Photosphere] |
| ** [3.5 Atmosphere|http://en.wikipedia.org/wiki/Sun#Atmosphere] |
| * [4 Solar activity|http://en.wikipedia.org/wiki/Sun#Solar_activity] |
| ** [4.1 Sunspots and the solar cycle|http://en.wikipedia.org/wiki/Sun#Sunspots_and_the_solar_cycle] |
| ** [4.2 Effects on Earth|http://en.wikipedia.org/wiki/Sun#Effects_on_Earth] |
| * [5 Theoretical problems|http://en.wikipedia.org/wiki/Sun#Theoretical_problems] |
| ** [5.1 Solar neutrino problem|http://en.wikipedia.org/wiki/Sun#Solar_neutrino_problem] |
| ** [5.2 Coronal heating problem|http://en.wikipedia.org/wiki/Sun#Coronal_heating_problem] |
| ** [5.3 Ultraviolet rays|http://en.wikipedia.org/wiki/Sun#Ultraviolet_rays] |
| ** [5.4 Faint young Sun problem|http://en.wikipedia.org/wiki/Sun#Faint_young_Sun_problem] |
| * [6 Magnetic field|http://en.wikipedia.org/wiki/Sun#Magnetic_field] |
| * [7 History of solar observation|http://en.wikipedia.org/wiki/Sun#History_of_solar_observation] |
| ** [7.1 Early understanding of the Sun|http://en.wikipedia.org/wiki/Sun#Early_understanding_of_the_Sun] |
| ** [7.2 Development of modern scientific understanding|http://en.wikipedia.org/wiki/Sun#Development_of_modern_scientific_understanding] |
| ** [7.3 Solar space missions|http://en.wikipedia.org/wiki/Sun#Solar_space_missions] |
| * [8 Sun observation and eye damage|http://en.wikipedia.org/wiki/Sun#Sun_observation_and_eye_damage] |
| * [9 Sun in human culture|http://en.wikipedia.org/wiki/Sun#Sun_in_human_culture] |
| * [10 See also|http://en.wikipedia.org/wiki/Sun#See_also] |
| * [11 References|http://en.wikipedia.org/wiki/Sun#References] |
| * [12 External links|http://en.wikipedia.org/wiki/Sun#External_links] |
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