The Sun has several layers, and the one that is not a layer of the Sun is the Corona.

Here's why:

* The Corona is the outermost layer of the Sun's atmosphere. It's not a layer within the Sun itself, but rather an extension of the atmosphere that extends millions of kilometers into space.

Here are the actual layers of the Sun:

1. Core: The innermost layer where nuclear fusion takes place.

2. Radiative Zone: Energy from the core travels outward as electromagnetic radiation.

3. Convective Zone: Hot gas rises and cooler gas sinks, transferring energy toward the surface.

4. Photosphere: The visible surface of the Sun, where light is emitted.

5. Chromosphere: A thin layer above the photosphere, characterized by reddish hues.

Let me know if you have any more questions about the Sun!