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'''International Year of The Quiet Sun'''
 
</dt><BR/>(abbr IQSY) By international agreement, a period, July 1963 to December 
1964, during which intensive observations of the sun and related geophysical 
phenomena are being made. Compare [[International Geophysical Year|International 
Geophysical Year]]. 
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==References==
''This article is based on NASA's [[NASA SP-7|Dictionary of Technical Terms for Aerospace Use]]''
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