2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/140461We point out that algebraically special Einstein fields with twisting rays exhibit the basic properties of conformal Universes considered recently by Roger Penrose.We changed our conventions, so that the sign of the cosmological constant agrees with the conventions of cosmologistsGeneral Relativity and Quantum CosmologyDifferential Geometrytext