Salam is very close to Yridia VIII and is warmed from the intense geologic activity at its core. Furthermore, Salam has a very thick atmosphere composed of Nitrogen and some Methane. The atmosphere is translucent during the day and completely transparent during the night. The surface lacks cratering, and has many mountain ranges, plains, and valleys. The surface is very rocky and in some places is sandy. During the day, there are constant storms across the surface with Methane falling as rain. The atmosphere is not conducive to life, however, given an air supply and suit, humanoids are free to walk the surface. There are several volcanoes on the surface, constantly spewing ash and lava from the planets interior. Most of the life on the moon, however, exists in underground caves and vents where an artificial atmosphere is provided. The caves are warmed by geothermal heating, and are themselves no longer active in the volcanic cycle. The network of caves and tunnels is nearly endless, carved by the moon’s volcanically active past. Tens of thousands can live and coexist in a normal society underground. Many of the walls have been reinforced, and some buildings have even been constructed inside the largest caverns.