Corrin
Homeworld of the Machine Empire and site of the final battle in the Butlerian Jihad.
Salusa Secundus
Harsh prison planet used by the Corrino Empire.
Kaitain
Seat of the Padishah Emperor and homeworld of House Corrino.
Giedi Prime
Industrial and polluted homeworld of House Harkonnen.
Caladan
Oceanic homeworld of House Atreides before they move to Arrakis.
Arrakis
Desert planet and only source of the spice melange. Central to the entire saga.