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Door 28 in the 2010 advent calendar
Posted By Emily Lakdawalla
2010/12/28 08:37 CST
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Time to open the twenty-eighth 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 cratered and streaked surface?

NASA / JPL / SSI / color composite by Gordan Ugarkovic
Door 28
Resolution is about 280 meters per pixel, and the image covers an area about 280 kilometers square.But there's other neat stuff besides the wispy terrain. There's a very straight but discontinuous crack running across the image from the upper left corner to the center. Near it, there's an especially fresh, rayed impact crater. Underneath it, running from left to right, is a curious pattern of parallel grooves (these are easier to see if you enlarge the image). I honestly have no idea what could have caused those grooves that would be distinct from what caused the formation of the wispy terrain. Maybe Paul Schenk knows!The Planetary Society Blog 2010 Advent Calendar
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