I always wondered if gravitational fields are more like the electromagnetic field lines. But instead of only being polar based, north and south poles, the grav

I always wondered if gravitational fields are more like the electromagnetic field lines. But instead of only being polar based, north and south poles, the gravitational field lines instead would emanate everywhere in all 3 dimensions. So that no matter where you are on the surface of the planet, you will always be at the converging point of your field line. Hence the term, being at the bottom of the gravity well. And other things, like mass, will affect the strength of such gravitational field lines.