Question

light year is a unit of..............​

Answer 1

light year is a unit of long distance

Answer 2

First of all we should know that what is a light year ?

Light year -The distance between  the various celestial objects ( objects  which are present in sky  like planets , asteoroids  comets, meteoroids , meteors etc. ) are expressed in the unit of   Light Years. one light year is the distance traveled by light in one year.

1  light year = 9.46 × (10)¹² kilometers

➥ but still the distance can not be measured in kilometers because kilometers is too small unit  to measure the distance between different celestial objects.

Noe let's come to your question -

Your question is -

Light year is the unit of  __________.

In above discussion we get to know that  light year is used to measure the distance ( between different celestial objects ).

So, your answer is -

Light year is the unit of distance.