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We derive stronger bounds on the magnetic monopole charge of the proton, andhence on non-associative quantum mechanics from measurements of the magneticfields of the Earth, the Moon and Mars. Limits are several orders of magnitudestronger than the ones inferred from the Hydrogen atomic levels, assuming thatelectrons do not retain a magnetic monopole charge. Conversely, we show how toestimate bounds on the magnetic charge of a proton correctly, when the magneticmonopole charge of the electron is taken into account.

Solar System and Atomic Stronger Bounds on Exotic Dyonic Matter and Non-associative Quantum Mechanics