English: Southern region of Mercury. Han Kan crater near the horizon forms rays visible in the photo. The craters Vincente and Rimbaud are at left. MESSENGER WAC image.
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]