{"type":"rich","version":"1.0","title":"First Friedmann equation with a cosmological constant","html":"<span class=\"wb-embed wb-embed-math\" data-latex=\"H^2 = \\frac{8\\pi G}{3}\\rho - \\frac{k c^2}{a^2} + \\frac{\\Lambda c^2}{3}\">H^2 = \\frac{8\\pi G}{3}\\rho - \\frac{k c^2}{a^2} + \\frac{\\Lambda c^2}{3}</span>","width":640,"height":320}