Drawing of Hades with Cerberus. Source: http://commons.wikimedia.org/wiki/File:Hades.png This image comes from the 4th edition of Meyers Konversationslexikon (1885-90); it is therefore Public Domain. Uploaded to Wikimedia Commons by user Michelmfb. Vectorized by Warszawianka.
Planet Pluto Bitmap Trace. This is the 180 degree view from Hubble Telescope. The Gimp was used to rescale and clean up image. The Original Public Domain file can be found at http://upload.wikimedia.org/wikipedia/commons/0/0b/Pluto-map-hs-2010-06-a-faces.jpg
Planet Pluto Bitmap Trace. This is the 270 degree view of Pluto from the Hubble Telescope. The Gimp was used to rescale and clean up the image. Inkscape blur of 1 was used. The original public domain image can be found at http://upload.wikimedia.org/wikipedia/commons/0/0b/Pluto-map-hs-2010-06-a-faces.jpg
Planet Pluto Bitmap Trace. This is the 90 degree face as taken by the Hubble Telescope. The Gimp was used to clean up, to rescale and reduce colours. The original public domain images can be found at http://upload.wikimedia.org/wikipedia/commons/0/0b/Pluto-map-hs-2010-06-a-faces.jpg