In gravitation an action-at-a-distance description of the interaction between two bodies is still in use. However, the momentum current picture presents a local-causes description of this interaction. The suggested approach can be used to visualise and quantitatively sketch the stress distribution in a weak static gravitational field by means of momentum current density field lines. Computer sketches of such streamlines in the common field of the Earth and the Moon are presented. It is shown that two massive bodies are 'pushed together' by their common gravitational field.