Johann Helvelius

Standard Name: Helvelius, Johann

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2 July 1665: Astronomer Johann Helvelius first recorded...

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2 July 1665

Astronomer Johann Helvelius first recorded observations of the stars made at home in Danzig (now Gdansk) in Poland by his wife Elizabeth Helvelius , his assistant and later his collaborator.
Cook, Alan. “Johann and Elizabeth Helvelius, astronomers of Danzig”. Endeavour, Vol.
24
, No. 1, Mar. 2000, pp. 8-12.
8-12

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