Dust is a massive planet that serves as the primary setting of Starhawk. Most of the single player and multi-player maps take place on this planet. The planet seems very dusty and mars-like, although little is known about how much it's geography alters in different areas of the planet. There are some trees located on the planet, confirming it can support natural life. The planet is colonized due to the abundance of Rift Energy that is located there. Whether this planet is the only source of Rift Energy, or where it was first discovered is unclear.
Dust has several moons surrounding it which is also where some of the action will take place. One such place is Acid Sea which takes place on one of the moons of Dust.