Jack Frost (1998 film) Jack Frost (1998 film) Jack Frost is a 1998 American Christmas fantasy comedy-drama film, starring Michael Keaton and Kelly Preston. Keaton stars as the title character, a man who dies in a car accident and comes back to life as a snowman. Three of Frank Zappa's four children, Dweezil Zappa, Ahmet Zappa, and Moon Unit Zappa, appear in the film. The costume for Jack Frost's snowman form was created by Jim Henson's Creature Shop. The film was released in Australia on December 10, 1998 before the United States' release. Jack Frost is the lead singer in a rock band simply
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