If the expansion of the universe happens uniformly, how does this affect small objects? For example, are the distances between protons and neutrons inside a nucleus actually expanding? Is the nucleus constantly pulling itself together so its diameter stays constant? What about say between the carbon atoms in a diamond? If I can observe said diamond forever, will its atoms eventually disassociate with each other or will it stay in one piece due to its covalent bonds counteracting the expansion of space?
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