Morrowdim

Morrowdim is a feral world of the Hadronian Wall in the Aliris Sector, located to the galactic south of the now destroyed fortress world of Cadia, in a star rich part of the Segmentum Obscurus, between the Eye of Terror and the Segmentum Pacificus. This forlorn, perpetually dark planet serves as the Adeptus Astartes homeworld of the mysterious and foreboding Night Walkers Space Marine Chapter.

Background
The Night Walker's homeworld, Morrowdim, is listed in catalogues as Umbricus I - the sole planetary satellite of a brown dwarf-star. Both Morrowdim and Umbricus are orbited by numerous moons and planetoids known as the 'Hundred Moons' though there are actually only 51 moon sized satellites the others being captured asteroids. Many of these are inhabited including the largest, Menae, home of the Order Militant of the Daughters of the Moons.

Fortress-Monastery
The Night Walkers' fortress-monastery, known as the ' Fortress of Dreadful Night ', is located on a hill above Morrowdim's chief settlement which is built over and into a slightly lower hill. Despite the fortress's intimidating name, the mortal inhabitants of Morrowdim are in and out of it all 'day' presenting petitions, bringing tithes or coming to see one of the Marines.

Chapter Culture
These dark masters of terror are, when at home among their own people, one of the most accessible of Space Marine Chapters even to maintaining ties with their mortal families which often include sisters among the Daughters of the Moons.

The Umbricus System orbits a flaring orange star, at a considerable distance, and is in close proximity to four white giant stars thus Morowdim, Menae and the other moons are not so much dark as drowned in perpetual twilight. The light of the dim, coppery sun not being much brighter than the starlight and reflected light of the many moons