Light year is a Astronomical unit which is used to measure distance in space.
ONE LIGHT YEAR (Distance) = 10 Trillion KiloMetre (A light travel in One Year)
Light Speed = 299,792,458 metre / second. (Approx 3 Lakh KiloMetre Per second)
Light Travel = (Speed of Light) x (Time)
Light Travel (in One hours) = 1,079,252,848,800 Metre (Approx 1079 Crore Kilometre / 10.07 Billion KM)
(in 24 hours / in one day) = 25,902,068,370,000 Metre (Approx 26 Thousand Crore KiloMetre / 259 Billion KM)
(In 365 days / In a Year ) = 9,454,254,955,000,000 Metre (Approx 10 Lakh Crore KiloMetre / 10 Trillion KM)