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1851
Publication of Schwabe's discovery of the periodicity of sun-spots
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19 May 1851 discovery of 14 Irene
29 July 1851 discovery of 15 Eunomia
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19 January 1851, Birth of Jacobus Cornelius Kapteyn in Barneveld, the Netherlands
12 April 1851 Birth of Edward Walter Maunder, in London, England,
3 August 1851 Birth of George Francis FitzGerald, in Dublin, Ireland
1851 Birth of Herman Frasch
1851 Death of William Nicol
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