Abstract
McVittie's solution of Einstein's field equations, representing a point mass embedded in an isotropic universe, possesses a scalar curvature singularity at proper radius R = 2m. The singularity is spacelike and precedes, in the expanding case, all other events in the spacetime. It is shown here that this singularity is gravitationally weak, and the possible structure of the region R2m is investigated. A characterization of this solution which does not involve asymptotics is given.
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