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.
Increase (given name) Increase (given name) Increase is a male given name. It is the English language literal translation of the name Joseph, which originates from Hebrew. Originating in England, the name was given primarily among Puritans in colonial New England and in the early 19th century in the United States. Since the 19th century, the name has declined in popularity and is now rare, if not extinct. The name Increase is the English literal translation of the name Joseph, which originates from the Hebrew language. The Hebrew version of Joseph, "Yosef" ("יוֹסֵף"), translates as meaning "Yahweh will/shall increase/add," or "He will add."