I was wondering, how does gravity tend to propagate? Across multiple examples, such as from a planet, a star, a galaxy, a black hole etc. I've always thought of gravity as something that propagates outwards in all directions, but the more I learn the less I'm starting to think that's the case. The main thing that confuses me, is how galaxies and black holes appear to have a shape or structure which is disk like, having jets of matter spewing out from the top and bottom. How is this that gravity causes things to form in disks? How does the gravitational force compare at the poles than it does around the equator of the object?