The Ood Sphere was a moon of a ringed planet, located in the same star system as the Sense Sphere, (home of the Sensorites), located in the Horsehead Nebula. (TV: Planet of the Ood, DWAN: Doctor Who The Official Annual 2007) It was covered in mountains and high cliffs and seemed to be cold enough to have snow and permanent buildings made of ice. (TV: Planet of the Ood, The End of Time)