2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/10051We re-analyze the issue of redshifts induced by a moving cosmic string by looking at moving sources and observers on a conical spacetime in a fully relativistic approach. By replacing the concept of a moving spacetime with the more clearly defined concept of moving sources and observers in the string spacetime, we show that there is no effect: the only redshift is a Doppler shift due to the motion of the source or observer.11 pages, LaTex file, 1 figure available in PostScript format at ftp://manitou.astro.utoronto.ca/pub/string/ (get fig1_mdp.ps)Astrophysicstext