Earlier data indicated possible ice deposits in permanently Shadowed craters near the moon's poles, where water from comet impacts could have been trapped over the moon's long history.

早期数据显示，可能的冰层存在于被永久遮挡的月球两极附近的陨石坑中，在月球漫长的历史过程中，彗星撞击带来的水可能埋藏在这些陨石坑中。