Asteroid fields, or asteroid belts, are fairly common in planetary systems. They consist of small planetoids, debris, and rocks orbiting a star or planet. Asteroid fields are often colonized, as they are generally mineral rich. However, they can be difficult to navigate and are hard on sensors, due to the number of astronomical objects they contain. One asteroid field in the Uncharted Territories was able to hide two Leviathan biomechanoids from Peacekeeper sensors for several days.
An asteroid field features in several episodes of the second season of Farscape.