1 Light Year = 9324744613632km
One light year is defined by travelling for 365 days at the constant speed of light, which is 299 792 458 m/s
m = distance in metres
s = time in seconds
Proxima Centauri is 4.3 light-years from the Sun.
Prices shown in USD.
Log in with Facebook to save your favorite definitions
and share them with friends.
Type your email address below to get our free Urban Word of the Day every morning!
Emails are sent from firstname.lastname@example.org. We'll never spam you.