The Zero Zone

The Zero Zone is a reality of stasis and eternal stillness, forever unchanging, and largely featureless. It is a dimension between dimensions, apparently used by some to traverse the dimensions, or simply as a dumping ground to store things or exile prisoners.
The Zero Zone looks like an endless vista of white nothingness. Cosmic flotsam drifts through it, ranging in size from small rocks to entire planetoids, difficult to discern in size due to the lack of reference points. Gravity is strictly a local phenomenon in the Zero Zone; larger objects have their own gravitational fields, but otherwise things simply drift aimlessly.
Vision tends to be limited, like moving through a thick bank of fog or an endless cloud. The “mist” of the Zero Zone isn’t actual water vapor or any other sort of physical cloud. It’s actually a “cloud” of probability; the further away something is, the less fixed and certain its actual location—or even existence—so a quantum “cloud” fuzzes out its shape. More distant objects cannot be seen at all.
This means the travelers’ experiences actually create the Zero Zone to a degree. Aspects of the Zone sometimes respond to thoughts, conscious or subconscious, bringing those things to life. Scientists posit a possible connection between the Zero Zone and the astral plane or dream dimension, as well as to the “depths” of hyperspace, where similar unusual phenomena are reported of visitors’ imaginations coming to life.
In the past, the Zero Zone has been used as a place of exile. Alien races (some long dead) used the Zero Zone as a prison, or a dumping ground. Since the Zone is influenced by thought, it can become a “heaven” or “hell” of the exile’s own making, depending on factors like strength of will and length of banishment. Visitors have found some “pocket” realities within the Zero Zone formed in this way.