Time to open the 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. Can you guess where this crater-scarred surface lies?Click to enlarge >Door 2This image has a resolution of about 400 meters per pixel when fully enlarged, and covers an area roughly 400 kilometers square. (Since the image is foreshortened — the craters are not round — the cited 400 ….
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