{"type":"rich","version":"1.0","title":"Gravitational potential energy of continuous mass distribution","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"U=-\\frac12 G\\int\\int\\frac{\\rho(\\mathbf{r})\\rho(\\mathbf{r}_1)}{|\\mathbf{r}-\\mathbf{r}_1|}d^3r\\,d^3r_1\">U=-\\frac12 G\\int\\int\\frac{\\rho(\\mathbf{r})\\rho(\\mathbf{r}_1)}{|\\mathbf{r}-\\mathbf{r}_1|}d^3r\\,d^3r_1</span><footer><cite class=\"wb-embed-author\">Rong Martin-Siebler ZHOU</cite></footer>","width":640,"height":320}