Time to open the twenty-third 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 is this oozing wound?Click to enlarge >Door 23The image has a resolution of 225 meters per pixel and covers an area about 300 kilometers square. Credit: NASA / JPL Cleopatra crater is a double-ring impact crater that formed geologically recently on the high, ….
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