International Solar Terrestrial Physics (ISTP) Historical Pages

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The Structure of the Sun

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Layers of the Sun

Core: Extends to 25% from Sun's center

Radiation Zone: 25-71% from the Sun's center

Convection Zone: 71% to the photosphere

Photosphere: 500 km thick

Chromosphere: 10,000 km thick

Convection in the Sun

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