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=Comparison of w:en:Chemical gardens grown on by NASA scientists on the International Space Station (left) and on the ground (right) |Source=http://www.nasa.gov/images/content/189510main_CSI-021.jpg |Date=~~~~~ |Author=NASA |