In the first 2 editions, a vast machine realm orbiting the Sun just opposite of Earth. Description pg. 102 Book of Worlds. Rules pg. 192 same book. Void Engineers discovered it & Iteration X took control. Revised Edition (Iteration X Revised) portrays it as a large, entirely empty realm where machines operate at higher than top efficiency & last much longer. Pg. 121 Infinite Tapestry portrays it as a world of ghosts pursuing their former goal mindlessly. Automatic systems attack anyone who comes near.