Radiantis: an Earth-like rocky planet with vast plains and numerous cliffs. No biological life has been detected. The temperature is low, and there is no liquid water on the surface. The atmosphere is dry and thin. The surface is rich in outcrops of transparent crystalline formations. Mineral mining was organized here, and, among other things, a revolutionary compact energy source was developed, significantly increasing the efficiency of space travel. It currently houses a scientific and industrial base for deep space exploration.