A light-year is equal to:
exactly 9,460,730,472,580.8
km
thats 9460730472580800 meters
from now on L is 9460730472580800 meters
there are
31 556 926 seconds in a year
(4.2 * L [m]) / 8000 [m/s] / 31,556,926 [s] = 157391 years
----
u unit of distance
y = unit of 1 year
a light year is 1
u/(u/y)
my original equation:
(299792458 [m/s] / 8000 [m/s]) * 4.2 [
u/(u/y)] all units cancel out except year
NEVER CHALLENGE DORK, TWAT.