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.
A light year is how far light can travel in a year. Light travels at 186,000 miles per second, the speed limit for the universe. So in a year a ray of light covers about 6 trillion miles. Think about it this way - in one second light can travel round earth 7 times! Imagine how far it gets in a year.