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]
{{Information |Description=NGC 4125 |Source=http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_name=sig07-025 |Date=2007/12/14 |Author=NASA/JPL-Caltech/K. Gordon (Space Telescope Science Institute) and SINGS Team |Permission=http://www.spitze