English: Evidence of Volcanic Explosion - The lower coarse-grained unit shows granular textures toward the bottom of this image of Home Plate. Also shown is a feature interpreted to be a "bomb sag", which is 4 centimeters across. This false color image was obtained using Spirit's panoramic camera.
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]