Irudi:Pluto.jpg

Description: Pluto is mostly brown. The above picture captures the true colors of Pluto as well as the highest surface resolution so far recovered. No spacecraft has yet visited this distant object in our Solar System. The above map was created by tracking brightness changes from Earth of Pluto during times when it was being partially eclipsed by its moon Charon. The map therefore shows the hemisphere of Pluto that faces Charon. Pluto's brown color is thought dominated by frozen methane deposits metamorphosed by faint but energetic sunlight. The dark band below Pluto's equator is seen to have rather complex coloring, however, indicating that some unknown mechanisms may have affected Pluto's surface.

Crédits: Eliot Young (SwRI) et al., NASA

Source: http://antwrp.gsfc.nasa.gov/apod/ap010319.html

Licence:

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). Warnings: Use of NASA logos (which include the current "meatball" logo, the old "worm" logo, and the seal) is restricted. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not in the public domain. Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [1] All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3]