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A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9460 730 472 580 .8 km , which is approximately 5.88 t

A parliamentary authority is a book of rules for conducting business (parliamentary procedure) in deliberative assemblies. Several different books have been used by legislative assemblies and by or

In mass communication, digital media is any communication media that operates in conjunction with various encoded machine-readable data formats. Digital content can be created, viewed, distributed,

A riff is a short, repeated motif or figure in the melody or accompaniment of a musical composition. Riffs are most often found in rock music, punk, heavy metal music, Latin, funk, and jazz, althou

A synonym is a word, morpheme, or phrase that means precisely or nearly the same as another word, morpheme, or phrase in a given language. For example, in the English language, the words begin, sta

Mathematical optimization (alternatively spelled optimisation) or mathematical programming is the selection of a best element, with regard to some criteria, from some set of available alternatives.

The Barberini ivory is a Byzantine ivory leaf from an imperial diptych dating from Late Antiquity, now in the Louvre in Paris. It represents the emperor as triumphant victor. It is generally dated

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) This article possibly contains original research.Ple

Human rights are universally recognized moral principles or norms that establish standards of human behavior and are often protected by both national and international laws. These rights are consid