2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/167668From the point of view of radiation safety, interstellar space is not an empty void. Interstellar gas and cosmic rays, which consist of hydrogen and helium nucleons, present a severe radiation hazard to crew and electronics aboard a relativistic interstellar ship. Of the two, the oncoming relativistic flow of interstellar gas produces the most intence radiation. A protection shield will be needed to block relativistic interstellar gas that can also absorb most of the cosmic rays which, as a result of relativistic aberration, form into a beamed flow propagating toward the front of the ship.16 pages, 4 figures, minor grammar corrections, references added, submitted to Acta AstronauticaSpace PhysicsGeneral Physicstext