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.
by John Carl Villanueva on September 10, 2009. 1 light year is the distance light can travel in vacuum in one yearâs time. This distance is equivalent to roughly 9,461,000,000,000 km or 5,878,000,000,000 miles.This is such a large distance. For comparison, consider the circumference of the Earth when measured at the equator: 40,075 km.This visible-light image shows the galaxy dubbed UGC 3789, which is 160 million light-years from Earth.hat assignment is given to the parsec. 1 parsec is approximately equal to 3.26 light years. Another commonly used unit of distance is the astronomical unit or AU, wherein 1 AU is the average distance between the Earth and the Sun, and is roughly equivalent to 150,000,000 km.