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 Astronomy Sci Advisor PF Gold P: 23,228 Quantum gravity research ties in to Planck units and it is possible to have variations on that theme. At one point (I think a couple of years ago) john baez was advocating that the units should be adjusted so that the central coefficient in the Einstein eqn have value one. that is the main equation of Gen Rel, and the coefficient that relates the left and the righthand sides is a force $$\mathbb{F} = \frac{c^4}{8\pi G}$$ I want to see what equations it makes look cleaner to use that constant rather than the more traditional G. Maybe nature would like us to use that constant