- from Light
If light, sound, and a spaceship got into a race to the Moon, which of them would win?
If you bet on light, you know it can outrun anything and everything, by far. It would get to the Moon in just over a second, and the spaceship would come in a very distant second place—about three days later! Sound would fizzle out as soon as it left the atmosphere, since it can’t travel in empty space.