Júpiter

Synopsis: Jupiter, the Great Red Spot prominently in its southern part. The dark spot is the shadow cast by Europe, a natural satellite.
Source: "Jupiter by Cassini-Huygens" by NASA / JPL / University of Arizona - http://photojournal.jpl.nasa.gov/catalog/PIA02873. Licensed under Public domain, via Wikimedia Commons.
URL: http://commons.wikimedia.org/wiki/File:Jupiter_by_Cassini-Huygens.jpg#mediaviewer/File:Jupiter_by_Cassini-Huygens.jpg