Shell star variables. Pleione and Gamma Cassiopeiae itself are both variable stars that have intermittent shell episodes where strong shell features appear in the spectrum and the brightness increases or decreases significantly. At other times the shell is not detectable in the spectrum, and even the emission lines may disappear. Shell star A shell star is a star having a spectrum that shows extremely broad absorption lines, plus some very narrow absorption lines. They typically also show some emission lines, usually from the Balmer series but occasionally of other lines. The broad absorption lines are due to rapid rotation of the photosphere,
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