A 'ridiculous' yet simple animation by a NASA scientist shows how long it takes light to reach Pluto. If you plan to watch it, take a day off work.

The speed of light is not as fast as you might think. To underscore this point, a researcher at NASA created a simple new animation (below) that shows what light-speed travel looks like between from the sun to Pluto. James O'Donoghue, a planetary scientist at the Goddard Space Flight Center, said he …