Fine Scale Structure in Cometary Dust Tails - Figure 5.3a - C/2011 L4 as seen by the STEREO-B HI-1 instrument (coarse scale difference images)

Views of C/2011 L4 Pan-STARRS from STEREO-B HI-1, enhanced as temporal difference images, using a scale with a wide dynamic range. The sun is centre below relative to all images (rotated 90$ degrees counter-clockwise and flipped from nominal orientation).