Photosphere but more tenuous corona. Other "surface features" on the photosphere are solar flares and sunspots. Photosphere The photosphere is a star's outer shell from which light is radiated. The term itself is derived from Ancient Greek roots, φῶς, φωτός/"phos, photos" meaning "light" and σφαῖρα/"sphaira" meaning "sphere", in reference to it being a spherical surface that is perceived to emit light. 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. In other words, a photosphere is the
Estelle (given name) Estelle (given name) Estelle is a female given name from latin origin , and mean "star". Saint Estelle was a martyr who purportedly lived in Aquitania in the third century AD although the earliest references to her date from the Middle Ages. The earliest formats of this Saint's name: Eustella/Eustelle and Eustalia, morphed into Estelle by Provençal poet Frédéric Mistral due to association with "estela" (Occitan for "star", of which Estelle is essentially a phonetic rendering in French), Saint Estelle being the patron saint of the Felibrige, a literary and cultural association founded by Mistral and other Provençal writers to