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]
The original description page was here. All following user names refer to en.wikipedia.
2006-12-11 07:14 CrypticBacon 512×640×8 (74336 bytes) Image of astronaut Dorothy Metcalf-Lindenburger. Taken from http://spaceflight.nasa.gov/gallery/images/behindthescenes/training/lores/jsc2004e40090.jpg, accessed Dec. 11, 2006. Caption included with image: "JSC2004-E-40090 (17 August 2004) --- Dorothy M