In the Newtonian theory, gravity is instantaneous. This is because the force law says that whenever you have to objects a distance $r$ apart, there will be a force between them inversely proportional to $r^2$. The force at any given instant depends on the distance at that same instant, which means that if you move one of the bodies a little bit, the other one will know about it immediately.

Of course, this is not what actually happens. It's just what you can deduce from Newtonian mechanics.

In the Newtonian theory, gravity is instantaneous. This is because the force law says that whenever you have two objects a distance $r$ apart, there will be a force between them inversely proportional to $r^2$. The force at any given instant depends on the distance at that same instant, which means that if you move one of the bodies a little bit, the other one will know about it immediately.

Of course, this is not what actually happens. It's just what you can deduce from Newtonian mechanics.