A good approximation would be: 1 light-year = 63240 AU (astronomical units) Just for information, 1 light-year is equivalent to the distance travelled by light in 1 year moving in a vacuum. Convert parsecs to light years | length or distance conversion What is a light-year? | Cool Cosmos Light is fast, but the distances are vast. A kilometer, or kilometre, is a unit of length equal to 1,000 meters, or about . If we want to calculate how many Miles is 1 Light Year we have to multiply 1 by 8212439646337500 and divide the product by 1397. Answer link Between ly and m measurements conversion chart page. BOOK A Briefer History of Time by Stephen Hawking: https://amzn.to/2GSh2yW DIVE INFollow me on Twitter: https://twitter.com/2MinuteClasroom Get Involved with. Using the common physics formula, distance equals rate times time or d = r x t, you can calculate how long a light year is: Light Year = (speed of light) x (one year). Express this distance in In one year there are 365 days of 24 hours. GUEST: 2018-01-15 02:23:29. Really. 1 Light Years to Kilometers | Convert 1 light year in km - UnitChefs Million Years to Year | Million Yearss to Years Conversion But light can do this same thing in one second! 1 astronomical unit (AU) is equivalent to the average radius of the Earth's orbit. End result: 5 ly is equal to 1.533007 pc. Approximately, 1 light year = 10^16 mts. How Long is a Light Year? - The Daily Dot What Is a Light-Year? | NASA Space Place - NASA Science for Kids We assume you are converting between light year and astronomical unit. Looking Back in Time When we use powerful telescopes to look at distant objects in space, we are actually looking back in time.