Do you mean:
* The layers of the Sun's atmosphere? In which case, the main layers are:
* Core: Where nuclear fusion occurs.
* Radiative zone: Where energy is transported outwards by radiation.
* Convective zone: Where energy is transported outwards by convection.
* Photosphere: The visible surface of the Sun.
* Chromosphere: A layer of hot gas above the photosphere.
* Corona: The outermost layer of the Sun's atmosphere, extending far into space.
* A specific layer of the Sun's atmosphere? For example, the photosphere, chromosphere, or corona?
* Something else entirely?
Please provide more details so I can give you the most helpful answer!
