The Adeptus Astra Telepathica
the Adeptus Terra. The organisation’s most important role is to train Astropaths. The title of Astropath is an abbreviation of Astro-telepath—it refers to a psyker capable of sending a telepathic message over interstellar distances. The vast distance between the stars means that technological forms of communication are useless. A psychic message sent though the warp is not necessarily instantaneous, but it is sufficiently quick to be a practical means of communication. Only Astropaths have the power to send and receive psychic messages over interstellar distances.