Shell star 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, the emission lines from an equatorial disk, and the narrow absorption lines are produced when the disc is seen nearly edge-on. Shell stars have spectral types O7.5 to F5, with rotation velocities of 200–300 km/s, not far from the point when the rotational acceleration would disrupt the star.
Mira (given name) the given name include: Mira (given name) Mira is a feminine given name with varying meanings. In the Romance languages, it is related to the Latin words for "wonder" and "wonderful." In South Slavic languages, it means "peace" and is often used as part of a longer name, such as Miroslava (masculine form: Miroslav) or Sławomira (masculine form: Sławomir). In Albanian language, it means "goodness" or "kindness". In Sanskrit, it means "ocean", "sea", "limit" or "boundary" In Hebrew, it is a derivative of Miriam or the female equivalent of Meir, meaning light. It is distinct from "Myra" which has a