2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/12644Universes with multiconnected spatial sections predict multiple images of cosmic sources. A confusing terminology exists in the naming of these images as real ones vs. ghosts. Here an attempt is made to clarify the situation.3 pages, 2 figures. Contribution to "Topics in Theoretical Physics, vol II: Festschrift for A. H. Zimerman." Revised version, with a correction on the fundamental polygonsAstrophysicsGeneral Relativity and Quantum Cosmologytext