Index
      
      International
                Quiet Sun Years 1965/1965
             
          
          
          
           
        
      
      
      The International Quiet Sun Years (IQSY) was a period from January
      1, 1964, to December 31, 1965, near solar minimum,
      when solar and geophysical phenomena were studied by observatories
      around the world and by spacecraft
      to improve our understanding of solar-terrestrial relations.
      
      
      
        
        
        2016 J. Giesen 
        zuletzt geändert: 11. Jan. 2016