A Tale of Two Hemipheres

The images from Cassini’s flyby of the Saturn moon Enceladus are starting to come in. From Cassini: Enceladus dramatically displays the contrast between its older and newer terrain. Newer surfaces (on the left in the image) will not have had time to accumulate craters. But as material sits exposed on the surface, impact scars build […]

from Astronomy News http://ift.tt/1mzpVy7
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