IQSY definitions

Iqsy

1) International quiet sun years
Found on https://www.crosswordclues.com/clue/iqsy

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IQSY

International Quiet Sun Year, the name given to a series of coordinated Sun-related observational programs performed in 1964 and 1965
Found on http://www.translationdirectory.com/glossaries/glossary142.htm

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IQSY

acronym: International Quiet Sun Years
Found on https://www.encyclo.co.uk/local/20002

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