The **light** **year** **unit** appeared **a** few years after the first successful measurement **of** distance to star other than sun, by friedrich bessel in. Was cygni and he used. Inch mm heliometer designed joseph von fraunhofer …

A **light** **year**, also **light** **year** or lightyear symbol ly **is** **a** **unit** **of** length equal to just under trillion kilometers meters petameters about ase miles. As defined by the international astronomical union iau distance that travels in vacuum one julian …

What **is** **a** **light** **year**. And how it used? Answer **light** **year** **unit** **of** distance. The distance that **light** can travel in one **year**. Moves at velocity about , kilometers km each second. So **year**, trillion km. More p recisely equal to , kilometers…

Light **year** **is** **a** measure **of** length. Get more information and details on the '**light** **year**' measurement **unit**, including its symbol category common conversions from **light** to other length units…

Hint **a** **light** **year** **is** **unit** **of** distance, not time. How astronomers measure in space. It's defined by far beam **light** travels one **year** six …

No. Light **year** ly **is** not **a** **unit** **of** time. Measure distance travelled by **light** in unu **year**. This used to long distances and has extensive applications astronomy…

this **is** **a** conversion chart for **light** **year** astronomical. To switch the **unit** simply find one you want on page and click it. Can also go universal page…

No **a** **light** **year** **is** the distance that **light** travels in **year**,. Million kilometers. Normally astromoners use to measure distances between stars…

A **light** **year** **is** the distance that can travel in **a**, or , miles second * seconds minute minutes hour hours day days **year** = ,, miles **year** miles ,, kilometers …