Light Year: A light year is the distance that light travels in one year through a vacuum, approximately equal to 9.461 trillion kilometers (about 5.878 trillion miles). It's used to measure vast cosmic distances.
Mile: The mile is a unit of length primarily used in the United States and some other countries. It is equal to 5,280 feet or 1,609.34 meters. The mile is commonly used for measuring longer distances, such as road distances.