Earth/Moon gravitational field

Gravitational fields (and force!) obey the principle of superposition. You can show that the field follows a spherical symmetry near the planets but the influence of the Earth extends farther because of its superior mass (80 times Moon's mass).
Notice the existence of a single point where the g field is equal to zero.
Click on the screen to show or erase the field lines.
This animation is not to scale.