Question

what is light year who it is​

Answer 1

Light-year is the distance that light travels in vacuum in one year.

It is a unit of length used to express astronomical distances.

1 light year = $9.46 \times {10}^{12} \: km$

Answer 2

Answer:

The distance between stars is very large so it is not convinent to writ them in kms.So it is measured in light years which me@ns the distan©e ©overed by light in one year