Question

in the context of space a 'light years' is_____

Answer 1

In the context of space a 'light year' is the distance that light can travel in one year.

More precisely, one light-year is equal to 9,500,000,000,000 kilometers or (9.5 x 10^12 km).

Answer 2

Light year is used to denote the distance that light traverses in an empty space within a period of one year.

The speed of light is 3 lakh kilometre per second and hence, while calculating it comes to one light year = 10 trillion kilometres.

It is a term which is not just used in space science but also in major parts of calculating astronomical data.