The Deep Umbra, also called the Deep Universe, is a vast realm outside Earth's Umbral space. It is largely an immense void. Alien creatures beyond imagining exist in the empty areas between stars, and bizarre planets whirl around foreign stars. The Deep Universe is most often explored by the Void Engineers, who have several bases (such as the Cop) in other systems.

The outer planets (the gas giants and Pluto) are within the Deep Umbra, with their own Shard and Shade Realms being of particular interest.

Locations in the Deep Umbra include:

  • Cerberus
  • Charybdis
  • Copernicus Research Centre (also called the Cop)
  • Paradox Realms