[LeGrande]

So in an existing gravitational field, the 'bond' between objects is instantaneous? Wouldn't this be apparent, one way or the other, in galaxies where stars orbit a hundred or more thousand light-years from the center? Or do galaxies behave as if they were a rigid solid object?>

You are thinking about it wrong : ) Gravity is a force that curves space. That curved space is the field. Objects simply follow the shortest route. The 'tighter' the curvature the higher the gravity.

Nothing is a rigid solid object. Everything is Electromagnetic waves of nothing : )

[ETL]

Gravity is a force that curves space. That curved space is the field.

What then is "frame dragging"? Doesn't it involve a time delay of some sort?

[ETL]

Nothing is a rigid solid object.

By "solid and rigid", I meant galaxies behaving like a spoked wagon wheel, where the rotating stars act as if they were rigidly connected to the center of the spinning galaxy. Ignore local effects for the sake of discussion.