Dweezil Zappa music by touring with the group Zappa Plays Zappa. The band features renditions of Zappa's original material and the lineup has often included Zappa alumni such as Napoleon Murphy Brock, Steve Vai, Terry Bozzio and others. Dweezil Zappa was born in Los Angeles, California, the son of musician Frank Zappa and Gail Zappa, who worked in business. He is the second of four siblings: his older sister, Moon, younger sister Diva and younger brother Ahmet. He is the cousin of actress Lala Sloatman. Zappa's father was of Sicilian, Greek, Arab, and French descent, and his mother was of French, Irish
Digit (unit) one twelfth of the diameter of the sun or the moon. This is found in the Moralia of Plutarch, XII:23, but the definition as exactly one twelfth of the diameter may be due to Ptolemy. Sosigenes of Alexandria had observed in the 1st century AD that on a dioptra, a disc with a diameter of 11 or 12 digits (of length) was needed to cover the moon. The unit was used in Arab or Islamic astronomical works such as those of Ṣadr al‐Sharīʿa al‐Thānī (d.1346/7), where it is called "iṣba' ", digit or finger. The astronomical digit was in use