In this paper we show that the moduli space of nodal cubic surfaces isisomorphic to a quotient of a 4-dimensional complex ball by an arithmeticsubgroup of the unitary group. This complex ball uniformization uses theperiods of certain K3 surfaces which are naturally associated to cubicsurfaces. A similar uniformization is given for the covers of the moduli spacecorresponding to geometric markings of the Picard group or to the choice of aline on the surface. We also give a detailed description of the boundarycomponents corresponding to singular surfaces.
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