A little overview of important planets in the Dune-universe.

	Arrakis, also known as Dune. The crown jewel of the Empire is the planet Arrakis, also known as Dune. A barely habitable ball of dust patrolled by hungry predatory behemoth Sandworms, Arrakis would be a negligible backwater if it did not contain the most valuable substance in the known universe: the Spice. This is the prize that the Great Houses all fight to control, since who-ever controls the flow of Spice controls the future of the Empire.
	Caladan The watery homeworld of house Atreides, Caladan, is rich in natural resources but maintains a largely agrarian and rural way of life outside of the main cities. An idyllic place to live in every way.
	Draconis IV Little is known about the icy ball of rock known as Draconis IV, home to House Ordos. It is sparsely populated and outsiders are not welcome.
	Giedi Prime Geidi Prime, is the homeword of House Harkonnen. Centuries of industrial pollution have reduced this densely-populated planet to a toxic slag heap. The oceans are pitch black with oil and the air is choked with smoke, dust and ash from the furnaces which work around the clock to produce the weapons that the Harkonnen need to dominate their enemies.