how much is a light year on earth?
<answer> One light year is equivalent to the distance travelled by light in one Earth year. <context> a Light Year is not a unit of time, but a unit of distance. One light year is equivalent to the distance traveled by light in one Earth year. 1 light year is equivalent to 9.461 x 10^12 kilometers. If you are not used to scientific notations, that’s around 9,461,000,000,000 kilometers in distance.