The smooth Snow Queen feature is strongly suspected to be ice originally just under the soil, uncovered by the thruster rockets as Phoenix set down on the north polar plains of Mars.

• 冰后光滑的特征很明显是在土壤下形成的冰块，当凤凰号飞船降落到火星北极平原时由火箭推进器揭露了其面纱。