Source: wikibot/light-second
= Light-second
{wiki=Light-second}
A light-second is a unit of distance that measures how far light travels in one second in a vacuum. Since the speed of light is approximately \\(299,792,458\\) meters per second, a light-second is equivalent to about \\(299,792,458\\) meters, or approximately \\(300,000\\) kilometers (or about \\(186,282\\) miles).