How Does Energy Travel from the Core to the Surface?

When is energy carried by photons, moving gas, or both?

Compare radiative diffusion and convection without treating either path as instantaneous.

A Sun-like star shown as a restrained cutaway reconstruction with a brilliant core, a glowing inner region, and cellular outer layers. — Vastward artistic reconstruction. The cutaway evokes a core, radiative transport, and convection; it is not a direct image of a stellar interior.

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