We need to calculate the number of seconds in one year.
time = (365 days) (24 hours/day) (3600 seconds/hour)
time = 31536000 seconds
We can calculate the distance that light travels in this many seconds.
distance = speed x time
distance = (3.00 x 10^8 m/s) (31536000 seconds)
distance = 9.46 x 10^{15} meters
A light year is 9.46 x 10^{15} meters
