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]
(Photograph of [[Comet Halley]]'s tail during [[1986]] appearance ([[NASA]] black & white photo).
[[NASA]] source [[URL]]: http://rst.gsfc.nasa.gov/Sect19/halcom01.gif.
Image from [[United States]] NASA [[Goddard Space Flight Center]] (GSFC) prepared by )
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