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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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           | Description | 
           Pioneer 10 image of Jupiter (image A50, taken on 1973/12/01 at a distance of 2557000 Km). Note how the  en:Great Red Spot is more prominent when Pioneer passed by than when the Voyager probes later visited Jupiter. This is an approximate color image since Pioneer only had 2 color filters instead of the 3 needed for true colour (to human eyes). The spot in general may have simply looked more prominent in 1974 because it is not in the middle of a dark band swirling around it, unlike during Voyager's time. Due to radiation interference with electronics, the probe had many difficulties acquiring complete images, and a clear view of the moon Io could not be obtained when the probe was in range. However, testing the effects of radiation on probe electronics was one of the mission goals. Future probes, such as the Voyagers, benefited from such data.
             -  Jupiter photo - Pioneer 10
 
             
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           | Date | 
           2006-01-16 (first version); 2006-12-23 (last version) | 
          
          
           | Source | 
           Originally from  en.wikipedia; description page is/was  here. | 
          
          
           | Author | 
           Original uploader was  Tablizer at  en.wikipedia Later versions were uploaded by  Beatgr,  Ricnun,  DrachenFyre at  en.wikipedia. | 
          
          
           Permission ( Reusing this file) | 
           
             PD-LAYOUT; PD-USGOV-NASA. 
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         Licensing 
        
         
          
           | Public domainPublic domainfalsefalse | 
          
         
         
          
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           This file is in the  public domain because it was solely created by  NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See  Template:PD-USGov,  NASA copyright policy page or  JPL Image Use Policy.) | 
           
            
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             - 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.
 
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             - The  SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use.  
 
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