Yesterday, Phoenix scientist Ray Arvidson said there may be ice directly under the Phoenix lander, exposed in the blast zone by the retrorockets used for Phoenix's soft landing. Yesterday's image showed a small portion of the exposed area that looks brighter and smoother than the surrounding soil. Today, Sol 5 for Phoenix on Mars, a new image shows a greater portion of the area under the lander. Scientists say the abundance of excavated smooth and level surfaces adds evidence to a hypothesis that the underlying material is an ice table covered by a thin blanket of soil.
Well, it's either ice, rock or the exposed tile floor from some ancient polar temple . . .