Scott Air Force Base, IL Demographic Information *. There is no Census data for the city of SCOTT AIR FORCE BASE, IL. We have pulled information for the ZIP Code 62225 instead.
A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More p recisely, one light-year is equal to 9,500,000,000,000 kilometers.
In any case, itâs clear a light-year is a vast expanse. Over a year, light travels 5.87849981 x 10 12 miles (roughly 9.4605284 x 10 12 kilometers.) Written out, thatâs 5,878,499,810,000 miles or 9,460,528,400,000 kilometers.