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## Light-year

en.wikipedia.org/wiki/Light-year

A light-year is a unit of length used informally to express astronomical distances. It is approximately 9 trillion kilometres (or about 6 trillion miles). As defined by the International Astronomica...

## How Far Does Light Travel in a Year? - Universe Today

www.universetoday.com/45047/how-far-does-light-travel-in-a-year/

Nov 14, 2009 ... And so in a single year, light travels a total of 9,460,528,000,000 m, ... use the distance that light travels in a year as a standard measuring stick ...

## Science on the Brain - How far is a lightyear? - Marshall Brain

marshallbrain.com/science/lightyear.htm

Then you multiply that by 365 days in a year. ... One advantage of using the lightyear as a unit of distance is that you automatically ... The maximum distance that light can travel in a nanosecond controls how big and fast computers can be.

Feb 19, 2014 ... Light from a star will travel a very specific distance in one year. ... Travel into space and get some answers with help from an astrophysicist in ...

## How Fast Does Light Travel? | The Speed of Light - Space.com

www.space.com/15830-light-speed.html

May 22, 2012 ... The speed of light in a vacuum is 186282 miles per second (299792 ... travel at the speed of light, you could go around the Earth 7.5 times in one second. ... The distance light travels in the course of a year is called a light-year.

## Light year - definition of light year by The Free Dictionary

www.thefreedictionary.com/light year

... English dictionary definition of light year. n. 1. The distance that light travels in a vacuum in one year, approximately 9.46 trillion kilometers . 2. often light years ...

## What is a light-year and how long is 1 light-year? - PhysLink.com

A light year is the distance between two points in space that it would take light to travel when the distance between the two points in time are one year.

## if a light year is the distance that light travels in one year , find the ...

Feb 16, 2014 ... if a light year is the distance that light travels in one year , find the number of miles , meters and kilometers in one light year . Can a tutor please ...

## Exploring the Stars in Orion – Light Year Madness!

D) To the star Alpha Centauri at a distance of 41 trillion km? Problem 2 – How far does light travel in one year, if 1 Earth year = 31,000,000 seconds?

## a light year is the distance light travels in one year.

www.jiskha.com/search/index.cgi?query=a light year is the distance light travels in one year. one light year is about 5.9x10^12 mi. If it takes light 3 months to travel from one star to

a light year is the distance light travels in one year. one light year is about 5.9x10 ^12 mi. If it takes light 3 months to travel from one star to another, about how far ...

### How far is a light-year? | Astronomy Essentials | EarthSky

earthsky.org

Nov 27, 2015 ... A light-second is the distance light travels in one second, or 7.5 times the distance around Earth's equator. A light-year is the distance light ...