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If I may, I'll make a slightly simpler (I think) derivation of the answer. We start with Gauss's law for gravity. In its integral form, it is $$\oint_{\partial V}\mathbf{g}\cdot \mathrm{d}\mathbf{...
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If I may, I'll make a slightly simpler (I think) derivation of the answer. We start with Gauss's law for gravity. In its integral form, it is $$\oint_{\partial V}\mathbf{g}\cdot \mathrm{d}\mathbf{...