The radiation zone is the middle zone in the sun's interior. Energy travels out of the core into the radiation zone. Energy travels through the radiation zone in the form of electromagnetic radiation. The radiation zone is so dense that the waves bounce around. The energy may not leave the radiation zone for millions of years. The radiation zone is directly below the convection zone and directly above the core. It takes an average of 170000 years for energy from the core to leave the radiation zone.
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| Structure | Solar core - Radiation zone - Convection zone |  |
| Atmosphere | Photosphere - Chromosphere - Transition region - Corona | |
| Extended structure | Termination Shock - Heliosphere - Heliopause - Heliosheath - Bow Shock | |
| Solar phenomena | Sunspots - Faculae - Granules - Supergranulation - Solar Wind - Spicules - Coronal loops - Solar Flares - Solar Prominences - Coronal Mass Ejections - Moreton Waves - Coronal Holes | |
| Other | Solar System - Solar Variation - Solar Dynamo - Heliospheric Current Sheet - Solar Radiation - Solar Eclipse - Spectral Class: G2 | |
