A Light-powered Lightyear

A lightyear is a distance unit equivalent to¬†9,500,000,000,000 kilometres, the distance that light in a vacuum will travel in a year. It’s also the total distance travelled by cars every year.

That statistic is absolutely mind-blowing. Light travels 299,792 kilometres every second and if most cars are travelling an average of let’s say 0.02 km/s (about 70 km/h) then that means that in order to travel a lightyear by car in a year then that means we have to have … 14,989,600 cars travelling at 70 km/h … ALL THE TIME! … More A Light-powered Lightyear