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 this way, how much is 1 light year in years?

A light-year is the distance light travels in one year. How far is that? Multiply the number of seconds in one year by the number of miles or kilometers that light travels in one second, and there you have it: one light-year. It's about

**5.88 trillion**miles (9.5 trillion km).How long is a light year in hours?

It really is an incredibly long distance -- a lightyear is roughly 6 trillion miles or nearly 10 trillion kilometers. Here's how you calculate it. You start with the speed of light, which is

**about 186,000 miles**per second. Then you multiply that by 3,600 seconds in an hour.How long does it take to go a light year?

This duration is a bit of a problem, as it makes space exploration a painstakingly slow process. Even if we hopped aboard the space shuttle discovery, which can travel 5 miles a second, it would take us

**about 37,200 years**to go one light-year.