"Spooky action at a distance" is a famous phrase Einstein coined to describe the effects of quantum entanglement, which are instantaneous (they "travel" faster than light). This bothered him, since he had discovered special and general relativity, in which all forces - electromagnetic and gravitational - propagate at the speed of light (and must do so to preserve the order of cause and effect). This is in contrast to Newton's theory of gravity in which gravitational influences are instantaneous.
Zeuzzz is a bizarre kind of anti-gravity/pro-electromagnetic crackpot (maybe he had a bad fall as a child). As you can see this particular jab of his was comically inept, so I couldn't resist commenting.
Why do you keep talking about EM forces on a thread about gravity? I never mentioned it once, you seem to have implied that in your head, and i'm sure that the people in this thread do not appreciate your attempts to derail this thread into a debate about EM forces (I never said that 'spooky action at a distance' does not encompass of EM forces, you, yet again, seem to have implied this yourself in your head)
And the term crackpot, is not a very nice term, is it? really? Have I said anything demeaning against you? No. And I wont. No one made any scientific progress by making personal jibes at people who they dont agree with on everything, did they, Sol?
And its got nothing to do with Einsteins use of this term, where the word 'spooky' comes from, that was mainly about quantum effects.
Back to gravity anyway....
The basic premise of gravity is that all mass attracts, but the actual mechanism by which this works is still an open question. People have searched for a particle explanation, mainly the 'graviton', but currently the only description is utilizing the metaphysical gravitational field.
This 'action at a distance' effect is shown in other forces laws, mainly the laws of Newton, Coulomb, Ampere and Weber. Webers electrodynamics lead to the finite propagation of infinite signals, prior to the invention of maxwells equations, for example. For example, how could the sun know how much mass there is on earth in order to apply to correct force to it? How is this force transmitted from the sun to the Earth? Can a body of finite dimensions act on other bodies in locations where the first body is not touching? These are quite philosophical questions that have no definitive answer, these questions were the basis of Huygens and Leibniz ciritisms.
Burniston brown made some interesting comments on this in the introduction of his book on action at a distance;
It was many years later that I realised that action-at-a-distance is not just another theory of the propagation of a force like ballistic propagation, or waves in an ether. I decided to make this point in a lecture at Oxford by showing the effect of a magnet on another, suspended magnet. I then pointed out that observable action occurred at an observable distance, so that if any member of the audience said it was not action-at-a-distance it was he who was making hypothesis. No one attempted to deny it. Why should we not admit that, sometimes, what appears to be happening is happening? The refusal to accept action at a distance has lead to all the difficulties and tortuous explanations connected with the ether vortices, waves, twisted space time, warped fields, and many other things - together with abortive experimental efforts to detect them.
The time has surely now come out to cut the Gordian Knot by abolishing all the ethers, abandoning the attribution of physical properties to nothing, and rejecting purely mathematical constructs like space time, that all ultimately result from trying to explain the long unsolved problem of action-at-a-distance."
How does gravity physically work? I Don't have a clue, and neither does anyone else. It just does.
there are other theories, but they're either way over my head or highly implausible I haven't decided which.