Door 22 in the 2010 advent calendar

Time to open the twenty-second door in the advent calendar. Until the New Year, I’ll be opening a door onto a different landscape from somewhere in the solar system. Where in the solar system are these degraded craters?Click to enlarge >Door 22The image has a resolution of about 100 meters per pixel and covers an area about 80 kilometers square. Credit: NASA / JPL Galileo captured this high-resolution view of Callisto’s ancient surface on ….


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