Door 17 in the 2010 advent calendar

Time to open the seventeenth 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 strange promontories?Click to enlarge >Door 17The image covers an area three centimeters square. Credit: NASA / JPL / Cornell / USGS Spacecraft cover great distances in open space to reach the planets and moons and smaller things that they explore. ….

URL: http://www.planetary.org/blog/article/00002835/

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