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]
This image, taken from this site [http://hubblesite.org/newscenter/newsdesk/archive/releases/1998/19/image/a] is listed as a NASA image and is part of a gallery of Hubble images
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