Scientists have been measuring the speed of light for three centuries, and they have it down to an accuracy of half a foot per second. The speed of light is 186, 282.3959 miles per second. Which reminds me of the Monty Python song:- Whenever life gets you down Mrs Brown, And things seem hard or tough. And people are stupid, obnoxious, or daft, And you feel that you've had quite enough... Just remember that you're standing on a planet that's evolving And revolving at nine hundred miles an hour, That's orbiting at nineteen miles a second, so it's reckoned, A sun that is the source of all our power. The sun and you and me and all the stars that we can see Are moving at a million miles a day. In an outer spiral arm, at forty thousand miles an hour, Of the galaxy we call the 'Milky Way'. Our galaxy itself contains a hundred billion stars. It's a hundred thousand light years side to side. It bulges in the middle, sixteen thousand light ye...