NOTE: This image is a composite of two different satellite images; a visible seam is present due to this. Unfortunately the freely available alternatives from NASA included lower resolution, greater cloud cover, and scanline artifacts. (EO-1, Landsat, ASTER imagery)
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]