Photosphere

The photosphere is a star's outer shell from which light is radiated. It extends into a star's surface until the plasma becomes opaque, equivalent to an optical depth of approximately 2⁄3, or equivalently, a depth from which 50% of light will escape without being scattered.

This article is about the astronomical object. For the image stitching feature, see VR photography.
Not to be confused with Photon sphere.

A photosphere is the deepest region of a luminous object, usually a star, that is transparent to photons of certain wavelengths.

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