A δ-class (delta class) or Dead World is an airless and completely sterile world, totally devoid of an atmosphere, ecosystem and native natural life, and unsuitable for supporting any life. With the possible exception of Imperial facilities such as Research Stations based on the planet, its population is otherwise nonexistent.
Most such planets have always been dead worlds; others were originally habitable worlds, reduced to dead world status through apocalyptic events, such as exterminatus, Tyranid consumption or destructive internecine war.
N.B. This classification is not to be confused with Death Worlds, which are planets with dangerous environments hostile to human life.
Notable Dead Worlds
|Adrantis Five||Segmentum Pacificus||Unknown||Unknown||Unknown||N/A|
|Belis Corona||Segmentum Obscurus||Belis Corona||Belis Corona||Belis Corona||Unknown|
|Berien VI||Ultima Segmentum||Unknown||Unknown||Unknown||Unknown|
|Dunen II||Ultima Segmentum||Unknown||Unknown||Unknown||Unknown|
|Gryphonne IV||Segmentum Tempestus||Unknown||Unknown||Unknown||8,520,000,000/0|
|Isstvan III||Unknown||Unknown||Unknown||Isstvan system||N/A, was 12 billion pre-Heresy2,3|
|General||Dead World • Death World • Desert World • Ice World • Jungle World • Ocean World •|
|Imperium||Adeptus Astartes Homeworld • Agri World • Cardinal World • Cemetery World • Civilised World • Feral World • Feudal World • Forge World • Fortress World • Hive World • Industrial World • Knight World • Mining World • Paradise World • Penal World • Quarantined World • Research Station • Shrine World|
|Xeno||Xenos World • Daemon World • Exodite World • Tomb World • Maiden World • Crone World • Ork World • Tau Empire • Craftworld|