2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118268Throughout the entire history of terrestrial civilization, only four projects involving transmitting of interstellar radio messages (IRMs) have yet been fully developed and realized. Nevertheless, we should understand a simple thing -- if all civilizations in the Universe are only recipients, and not message-sending civilizations, than no SETI searches make any sense. We present the theory and methodology of composing and transmitting of future IRMs.14 pages, 3 tablesPopular PhysicsAstrophysicstext