Door 18 in the 2010 advent calendar

Time to open the eighteenth 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 brush-stroked surface?Click to enlarge >Door 18The image covers an area of about 1.2 kilometers square at 0.9 meters per pixel. Credit: NASA / GSFC / ASU The thing that is responsible for the wispy, brushstroke-like texture on this part of the Moon’s ….

URL: http://www.planetary.org/blog/article/00002837/

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