The Imperial Astronomical Society surveys the night skies, mapping the stars and the spaces in between. At the farthest reaches, well beyond the edges of the Imperium and the Magna Supremacy, the charts are blank, not because these places are empty, but because they are devoid of our understanding.
These are the areas of the great unknown where dangers may lurk and the darkness is at its darkest. As the ancient cartographers would say, "Here there be dragons…"