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]
The original description page was here. All following user names refer to en.wikipedia.
2009-06-17 05:07 Materialscientist 703×186× (18365 bytes) {{Information |Description = Silicon nitride thruster. Left: Mounted in test stand. Right: Being tested with H<sub>2</sub>/O<sub>2</sub> propellants |Source = http://www.grc.nasa.gov/WWW/RT/RT1999/5000/5130eckel.html |Date = |Aut
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À gauche : "Ces propriétés [du nitrure de silicium] ont été mesurées par des ingénieurs de la NASA en soumettant une tuyère en nitrure de silicium monolithique à cinq cycles de combustion H2 dans O2 comprenant un cycle de cinq minutes à 1 320 °C" .
{{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Silicon nitride thruster. Left: Mounted in test stand. Right: Being tested with H<sub>2</sub>/O<sub>2</