RM
Artwork of a cutaway view of the Sun's interior
Sun structure. Cutaway artwork showing the inside of the Sun. At the centre is the core (white), the site of the Sun's nuclear reactions, which fuse hydrogen to form helium. The core is at a temperature of around 15 million Kelvin, and some four million tonnes of material is destroyed each second by the reactions. Above the core is the radiative zone, where the photons produced in the core collide with charged particles, re-radiating heat and light. Above this is the conductive zone, where hot gas (arrows) rises to the surface to release energy before falling back to be reheated. A sunspot (dark) is seen at upper right, a cooler area on the Sun's surface.
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