English: Mars Orbiter Laser Altimeter (MOLA) colorized topographic map of the central part of the Tharsis volcanic province in the western hemisphere of Mars, centered on the three massive aligned shield volcanoes known as the Tharsis Montes. The even larger volcano Olympus Mons is in the upper left; the western end of the Valles Marineris canyon system is on the right.
Many of the features on this map are annotated in Wikimedia Commons.
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]