2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34800A recent refinement of Penrose's conformal framework for asymptotically flat space-times is summarized. The key idea concerns advanced and retarded conformal factors, which allow a rigid description of infinity as a locally metric light cone. In the new framework, the Bondi-Sachs energy-flux integrals of ingoing and outgoing gravitational radiation decay at spatial infinity such that the total radiated energy is finite, and the Bondi-Sachs energy-momentum has a unique limit at spatial infinity, coinciding with the uniquely rendered ADM energy-momentum.4 revtex4 pages, 1 eps figure, presented at 6th APCTP International Conference on Gravitation and Astrophysics, Ewha Womans UniversityGeneral Relativity and Quantum Cosmologytext