The following mechanism leads me to wander that a moving neutral object (compose from atoms) in vacuum may generates electric filed due to very small dipole moment. I propose that when atoms force to move in a certain direction the force propagates within the atom. A retardation in movements will happen depending on response time and the time it takes the force (Field) to travel within the atom (probably the speed of light). This leads to a very small shift (depending on the atom velocity) in electron clouds relative to the position of the nuclei (very similar to portability but without external electric field). My first simple estimation (classical approach) is that for 1m/sec the atom clouds shits in 10-18m. This would generates dipole moment of 10-5Debay (just for comparison H2O has 1.85Debay). 1. Did someone consider such mechanism? (I need link or paper). 2. Is it possible to measure such low dipole moment? 3. Consider lattice of mole atoms then I expect this dipole moment to sum up to much more significant, isn't it?