About the Units
light year (l. y.)
The distance light travels in one year, used for astronomical measurements.
mile (U.S. survey) (mi (U.S. survey))
A slightly different mile unit used in land surveying.
Common Conversions
- 1 l. y. = 5878614000000.0 mi (U.S. survey)
- 1.7010814e-13 l. y. = 1 mi (U.S. survey)