2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/14200The question of the physical reality of the black hole interior is a recurrent one. An objection to its existence is the well known fact that the velocity of a material particle, refered to the stationary frame, tends to the velocity of light as it approaches the horizon. It is shown, using Kruskal coordinates, that a timelike radial geodesic does not become null at the event horizon.4 pages, 1 postscript figureAstrophysicsGeneral Relativity and Quantum Cosmologytext