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]
NASA image. NASA content (images, videos, audio, etc) are generally not copyrighted and may be used for educational or informational purposes without needing explicit permissions.
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):