The Sun and Moons
Tranquan's sun produces electromagnetic radiation and charged atomic particles which causes electrical storms on the planets surface in the shape of ball lightning. They're very common and powerful. They caused quite a bit of damage to the planets city when the energy conductors weren't raised. The Tranquan planet also has at least two moons. One large and one small. They were a sight to see for the Tranquan people when they reemerged from their Sinth.