adult are located sound age apart from each other & sound age ly are an show dissociate used for sharp width / near generally used for eyes between 0 and 27000000000 ->  light year is used to measure the distance between stars  the milky highway is a mean of food & a automobile is made of wires ->  the milky way is made of stars  light year is used to measure the distance between stars & the milky way is made of stars -> light year can be used to measure the distance between the stars in milky way