Lava Lake on Ulatyu
Besides the stars Orian Major and Minor, the Orian system is home to another pair of twins - the planets Ulatyu and Nuvenpa. These two barren worlds orbit closest to Orian Major in a double-helix, circling one another like twin moons. Neither world supports life and both are wrought with treacherous storms caused by the others immense gravitational attractions.
Sand and dust storms are ever present and there are frequent unexpected, and violent, volcanic breakouts and eruptions. Rarely a day passes when the twins are not upturned and reshaped by the destructive conditions. The intense volcanism results in frequent ash storms, pyroclastic flows, and acidic clouds. Ulatyu is the less severe of the wretched twin rocks, ironically.