light-year

light year|lightyear|light-years|lightyears|light years

Light-year

unit of astronomical length, defined as the distance that light travels in the vacuum in one year

1e16m comparison 10 light years sirius.png

l.y.

Distance that light travels in one year

<span lang="en" dir="ltr"><span class="mw-page-title-main">Light-year</span></span>

A light-year, alternatively spelled light year, is a unit of length used to express astronomical distances and is equal to exactly 9460730472580.8??km, which is approximately 9.46 trillion kilometres or 5.88 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year. Despite its inclusion of the word "year", the term is not a unit of time.

en

https://upload.wikimedia.org/wikipedia/commons/d/d3/12lightyears.gif

1354417426

https://upload.wikimedia.org/wikipedia/commons/thumb/d/d3/12lightyears.gif/330px-12lightyears.gif

Light-year

standard