The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]
Saturn's rings in false colour, in which [[dusty plasma]]s have been suggested to cause certain effects. Image[http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-saturn.html Source] | [http://solarsystem.nasa.gov/planets/profile.cfm?Object=Saturn&Disp
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