On Tuesday March 12, the comet known officially as comet C/2011 L4 (PANSTARRS), stood almost directly above the western horizon, less than 5 degrees to the left of a very narrow crescent moon as seen ... more 
On Tuesday March 12, the comet known officially as comet C/2011 L4 (PANSTARRS), stood almost directly above the western horizon, less than 5 degrees to the left of a very narrow crescent moon as seen in this space wallpaper. less 
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SPACE.com | Photo By Dale P. Cruikshank
Wed, Mar 13, 2013 8:12 PM EDT