Imagine 112 miles. Beyond the distance you can walk. If you get in your car and get on a highway, it is almost two hours of travel time. Now compare that distance to three inches. about the length of the longest finger of an adult. Three inches out of 112 miles. In relative terms, that is the distance human beings have travelled into space as compared to the distance we must travel to reach the nearest star. In late 1968, human beings traveled to the moon, circled it and returned. Proxima Centauri is 4.24 light-years away. Three inches out of 112 miles.