Comment Not that surprising? (Score 1) 32
My roof gets ~150-250F for 8 hours a day direct UV exposure and we regularly go 9 months without rain here. There's no atmosphere to filter the UV and the ISS can reach 300F worst case so it's worse but not an order of magnitude worse. ISS has a true vacuum but i'm not sure if that helps or hurts above water's boiling point. Every winter before the rainy season comes I have to go on the roof and brush off the thick carpet of moss that has started forming in the shadiest parts. So clearly nature is working as intended.