EntityQ6987233· pop 20· linked from 200 articlesnegative massSign in to savehypothetical type of exotic matter whose mass is of opposite sign to the mass of normal matterConnectionsmassEntitygravityEntitywormholeEntityAlbert EinsteinPersonIsaac NewtonPersonStephen HawkingPersonBig BangEntityquantum mechanicsEntitytemperatureEntityInternational Standard Book NumberEntitymatterEntityaccelerationEntityUniversity of OxfordEntitygeneral relativityEntityPaul DiracEntityphotonEntitypressureEntityspaceEntityhypothesisEntityelementary particleEntityCategoriesExotic matterGravityHypotheses in physicsMassWarp drive theoryWormhole theory