Energy is not a laurence and variant concept. Energy depends on your frame of reference. John says, can an electron be coerced to revolve around a positron? And if so, wouldn't this have the same spectrograph as hydrogen? A so for the first part, yes, it absolutely can, and has been. There is something called positronium, which is an electron and a positron in a bound state with each other. The mass of the proton is very different than the mass of a positron. So therefore, you are oingto get frent spectrum.