io9 (July 2) -- It looks like we might have overestimated how many neighbors we have. New predictions show that the universe might be an emptier place than we imagined. Astronomers have been excitedly guessing at the amount of faint, distant galaxies that they can’t see. Lurkers surely outnumbered visible galaxies. New simulations done on Blue Waters, a supercomputer at Illinois' National Center for Supercomputing Applications indicate that that isn’t the case.