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. [3]
{{Information |Description=Converted from Olympus_Mons.png. From [http://spacelink.nasa.gov/NASA.Projects/Space.Science/Solar.System/Viking/Viking.Orbiter.Images/Mars.Olympus.Mons.Caldera.b.gif] Photo credit: NASA |Sourc