Answer: igy

AnswerCrossword Clue
IGYDonald Fagen hit that refers to a scientific event
IGY1957-58 sci. project
IGYAbbreviation in the news.
IGYRecently ended period of scientific activity.
IGYGlobal milestone of science: Abbr.
IGYPer. from July 1, 1957 to Dec. 31, 1958
IGY1982 Donald Fagen hit subtitled "What a Beautiful World"