photosphere
noun
- visible surface, stellar surface layers (star's outer shell) from which optical radiation escapes; region from which externally received light originates; deepest region of a luminous object, that is transparent to photons of certain wavelengths
Wiktionary
noun
Etymology: From photo- + -sphere.
- A visible surface layer of a star, and especially that of a sun.
- A 360-degree panoramic photograph that provides a full view of a scene from all angles.