Question

8) Why is the distance between stars expressed in light year ?​

Answer 1

Explanation:

Light-year is a large unit and equals the distance travelled by light in one year. Hence, the large distances are expressed in light-years.

1 light-year = 9.46 x 1012 km

If a star is located 8 light-years away from the earth, it means that the distance between the star and the earth is the distance light would travel in eight years.