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Mysterious brown dwarfs are neither planets nor stars, but this one somehow has northern lights, meaning it could have a volcanic moon like Jupiter's.

United statesAmerican museum of natural historyNew yorkAustin rothermichCity university of new yorkAmerican astronomical societyNatural historyAmerican astronomicalCity universityJames webb space telescopeBrown dwarfMethane emissionL hustakMysterious objects