Delmagh was a terrestrial planet located in the Vos Kalzi system of the Tynnan cluster, a dwarf galaxy above the galactic plane. The planet was bombarded with large quantities of ultraviolent radiation due to its proximity to its ultraviolet white dwarf star. The planet had a rocky core, leaving it tectonically active. In orbit, Delmagh had a small ring of debris from a cosmic collision early in the planet's history, and the debris provided resources for the Danthiri population. Most water on the surface was dried up or toxic, though there were non-toxic subterranean sources of water.