1 – The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (equal to 186,287.49 miles per second).
2 – It takes 8 minutes 17 seconds for light to travel from the Sun’s surface to the Earth.
3 – 10 per cent of all human beings ever born are alive at this very moment.
4 – The Earth spins at 1,000 mph but it travels through space at an incredible 67,000 mph.
