Click on image to enlarge.
Near-Surface Haze or Fog on Pluto:
Release Date: September 17, 2015
In this small section of the larger crescent image of Pluto, taken by NASA's New Horizons just 15 minutes after the spacecraft's closest approach on July 14, 2015, the setting sun illuminates a fog or near-surface haze, which is cut by the parallel shadows of many local hills and small mountains. The image was taken from a distance of 11,000 miles (18,000 kilometers), and the width of the image is 115 miles (185 kilometers).
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute