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Hendrik C. van de Hulst
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Hendrik Christoffel "Henk" van de Hulst (19 November 1918 – 31 July 2000) was a Dutch astronomer and mathematician.
In 1944, while a student in Utrecht, he predicted the existence of the 21 cm hyperfine line of neutral interstellar hydrogen. After this line was discovered, he participated, with Jan Oort and C.A. Muller, in the effort to use radio astronomy to map out the neutral hydrogen in our galaxy, which first revealed its spiral structure.
He spent most of his career at the University of Leiden, retiring in 1984. He published widely in astronomy, and dealt with the solar corona, and interstellar clouds. After 1960 he was a leader in international space research projects.〔"Hulst, Hendrik Christoffel van de." in ''Encyclopædia Britannica'' (2010)〕
In 1956 he became member of the Royal Netherlands Academy of Arts and Sciences.
==Honors==
Awards
*Henry Draper Medal of the National Academy of Sciences (1955)〔(【引用サイトリンク】url=http://www.nasonline.org/about-nas/awards/henry-draper-medal.html )〕
*Eddington Medal of the Royal Astronomical Society (1955)
*Bruce Medal of the Astronomical Society of the Pacific (1978)〔(【引用サイトリンク】url=http://astrosociety.org/membership/awards/pastbruce.html )〕
*Karl Schwarzschild Medal of the Astronomische Gesellschaft (1995)
Named after him
*Asteroid 2413 van de Hulst
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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