Six years at roughly 186,000 miles per second.which we can’t come anywhere close to doing with current technology (or probably ever). Misty Baird if you’re traveling at The Elite Change The World Hangman Shirt of light. One light year = 9,460,730,472,580.8 kilometres. So yeah, it’s just around the corner. A lightyear is nothing but the distance that the light travels in one year. The value is very huge. That’s why we use that as some reference to measure the distance, particularly in space.