Web Results

en.wikipedia.org/wiki/Light-year

... fractions of a light year, and are usually expressed in astronomical units. ... is also used occasionally for approximate measures.

earthsky.org/space/what-is-a-light-year

Feb 20, 2013 ... Hint: A light-year is a unit of distance, not time. ... A light-year is how astronomers measure distance in space. It's defined by how far a beam of ...

starchild.gsfc.nasa.gov/docs/StarChild/questions/question19.html

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second.

starlab.com/articles/what-is-light-year-and-why-is-it-used

Aug 1, 2013 ... Light year is used to measure the distance in space. ... using normal units of miles and kilometres, astronomers use light year to interpret it.

units.wikia.com/wiki/Light-year

The original article was at Light-year. The list of authors can be seen in the page history. As with the Units of Measurement Wiki, the text of Wikipedia is available ...

www.telescope.org/nuffield_21_sci/astrounits.htm

How Distances are Measured in Astronomy. Dealing with ... AU (astronomical units) ... The light year is is the distance that light travel in one year (365 1/4 days) .

coolcosmos.ipac.caltech.edu/cosmic_classroom/cosmic_reference/distance.html

In astronomy, the most commonly used measures of distance are the light year, parsec and astronomical unit. Astronomical Unit (A.U.) An astronomical unit ...

science.howstuffworks.com/dictionary/astronomy-terms/question94.htm

A light year is a way of measuring distance. That doesn't make much sense because "light year" contains the word "year," which is normally a unit of time.

www.sciencedaily.com/terms/light-year.htm

A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in a vacuum in one year. While there is no ...

physics.stackexchange.com/questions/17968/how-light-years-is-measured

We don't directly measure distances to anything light years away by timing light. " Light year" is just a unit of distance like a mile or kilometer.