A light year, also light-year or lightyear, is a unit of length, equal to just under 10 trillion kilometres. The light-year is often used to measure distances to stars and other distances on a galactic scale. Most Stargates are at least a light year apart. The Ancient vessel Destiny is several billion light years away from Earth. (SGU: "Air, Part 1")

External LinksEdit

• Light year on Wikipedia