This is interesting news, but not very surprising strangely enough. If you assume that the next approximation to Newton's gravity equations are similar to Maxw

This is interesting news, but not very surprising strangely enough. If you assume that the next approximation to Newton's gravity equations are similar to Maxwell's equations (thereby introducing a secondary field analogous to B, the magnetic field) then you can do back of the envelope calculations that get you interesting results including this one - i.e. our universe's radius is of the order of Schwarzchild's radius of a black hole of the mass we estimate, together with the acceleration equivalences under that condition. By that I mean - the two situations of you accelerating w.r.t the rest of the universe and the rest of the universe accelerating w.r.t. to you are physically indistinguishable. You can get that for rotation (in which case the B analog gives you Coriolis force) and for linear acceleration as well. I think in these limiting calculations you get some constant factors wrong (like the Newtonian escape velocity calculation) but the order turns out ok. This "analog of B" is called the "gravitomagnetic field" (http://en.wikipedia.org/wiki/Gravitomagnetism http://en.wikipedia.org/wiki/Gravitomagnetism) and NASA's GP-A and GP-B probes (http://en.wikipedia.org/wiki/Gravity_Probe_B http://en.wikipedia.org/wiki/Gravity_Probe_B) are for measuring this effect near earth.