Gravity isn’t a particle like light is, so why is it bound by a certain speed? Why wouldn’t it be instant?
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>Gravity isn’t a particle like light is
Well we don’t know of a particle for gravity, but many (if not most) physicists believe there is something called the “graviton”, a quantisation of gravity the same as the photon being the quantisation of electromagnetism.
The speed of light is the speed at which anything massless travels through space. It can be thought of as the maximum speed at which things can affect each other according to relativity. Changes in gravity are just as subject to Einstein’s relativity as changes in any other field.
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