Nexuta

Nexuta is the sole celestial body orbiting the mysterious star Un, in the Guild Expanse of the Milky Way Galaxy. It is a barren and dead world, completely lacking an atmosphere. However, it has remained unscathed by meteor impacts, and has a perfectly uniform surface of unremarkable blue-gray rock. A single large structure resides on Nexuta, known as the Nightmare Telescope. Believed to be an old observatory built by a long lost alien civilization to study Un's unique properties, the Nightmare Telescope has since served as the home of the Only Hierophant, who, with the help of his followers in the Infinity Guild, has built it up into a magnificent temple. Due to strange gravitational fluctuations produced by Un, Nexuta has a perfectly circular orbit, and each Nexutan year is exactly 221 Terran days long. The planet also appears to be tidally locked (which is also maintained by unknown forces), forcing the Nightmare Telescope to perpetually face towards Un.