Spine of Xinteth

The Spine of Xinteth is named for what some of the first travelers in the astral thought was the bones of a dead god. An immense mountain range which spans thousands or tens of thousands of AU, it dwarfs the entire known galaxy. Colors range from mottled pinks and purples to black and slate gray.
The Spine forms one of the borders of known space, as well as creating the calmer regions of the astral by sheltering them from the prevailing astral winds.