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,
What Is to Be Done? (novel) The "Dame in mourning" appearing at the end of the novel is Olga S. Chernyshevskaya, the author's wife. Characters with the last name "Kirsanov" also appear in Ivan Turgenev's "Fathers and Sons". Dostoyevsky argues with Chernyshevsky's ideas in "Notes from Underground". In particular, he responds negatively to Chernyshevsky's idealization of The Crystal Palace, a theme which is referenced throughout Russian literature. American playwright Tony Kushner referenced the book multiple times in his play "Slavs!". The main character of Gide's "Les caves du Vatican" (En. "Lafcadio's Adventures"), Lafcadio, resembles Rakhmetov. In the book "", author Chris Matthew Sciabarra claims that "What