By definition vacuum is fully devoid of matter right ? But scientists say that the space is always fizzing with photons where the existence of the same is too ephemeral to be captured. Even though they appear very fleetingly these photons emit energy same as of other photons do. So according to Quantum Mechanics and the uncertainty principle, the vacuum so called is apparently not fully vacuum. The result is astonishing because, it points out the existence of friction in vacuum also. It has a got a reverse impact on Newtons Laws of motion where it says, in vacuum there is no frictional force acting up on a body in motion. So the new experimental results, which are yet to be come fully says that a body in rotational motion in vacuum space have to face some frictional force. The stars,planets,moons & dust particles are facing this friction .I wonder,do they stop rotating at some point ? [ courtesy: http://goo.gl/21VZ9 ]