Main Question or Discussion Point
Suppose I hold a pencil by its tip and turn it around 20°, around the axis which goes through the pencil's length. The pencil's base, at the other extremity, a few centimeters away, will also turn by 20°. Now suppose this is a huge pencil which stretches from the earth to the sun. By turning its tip over here, I will be turning its base at the sun instantly. Doesn't this violate the principle that no information can be propagated faster than the speed of light?