Image:Hst pluto1.png
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This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy).
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Pluto and Charon from the Hubble Space Telescope.
Images of Pluto taken by the NASA Hubble Space Telescope with the ESA Faint Object Camera. These images, taken in late June and early July, 1994 are the first views which allow resolution of features on Pluto's surface. Opposite hemispheres are seen on the left and right. The large lower images are processed versions made from a number of Hubble observations. The smaller images at the top are actual raw images, each pixel is over 150 km across. The variations in brightness may be due to topographic features and/or surface composition, frost layers, and interactions with Pluto's nitrogen-methane atmosphere. Pluto is 2390 km in diameter and north is up. (HST, STScI-PR96-09a)
Source Image is based on image from this link:
http://nssdc.gsfc.nasa.gov/imgcat/html/object_page/hst_pr96_09a.html
Modified slightly by working with GIMP, removing lines, and applying a Gaussian Blur to smooth out pixels in original image, to make it more "natural". It is this modification that is placed under GFDL. (Trivial to do yourself, but "original work" neverless.)
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