The problem is, we arent talking about orbiting on a RE. They have said that you have to get really high up, based on nothing but speculation. If we can build a rocket big enough to get this high, we somehow magically contact the UE and the get a fuel free upwards acceleration of 9.8ms^2 the same as the earth. So we cant just kind of hang there, we dont even need to orbit. But we can orbit around the same point the sun/moon do (im still not sure what they are orbiting around, and how this gets weaker/stronger to vary the circumference of the orbit to give us the seasons).