Images show jets of gas emitted from very specific places on the surface, and there are wide circular pits here and there which may be gas vents, growing wider over time as the ice below is depleted.

图片显示，它表面的一些特定地方喷出了气体，到处都是圆形的大坑洞，可能是排气孔，随着时间的推移，下方冰层的枯竭，这些坑洞就越来越大。