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1776
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Hell, Maximilian
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Since 1776, Güssmann collaborated with Hell on astronomical observations in Vienna, leading up to Hell’s publication “ Ephemerides astronomicae ”
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Hell, Maximilian
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Hell assisted Franz in doing astronomical observations in Vienna
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1768 – 1769
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Hell, Maximilian
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On invitation by the Danish King Christian VII, Hell and Sajnovics conducted astronomical observations on the isle of Vardø in 1768–1769
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Koc, Jan
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Narwojsz conducted astronomical observations together with Bystrzycki and Koc
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Koc, Jan
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Koc conducted astronomical observations together with Gawroński and Bystrzycki
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1769
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Rostan, Alexandre Pancrace
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Rostan and Łuskina carried out astronomical observations together in 1763, 1764, and 1769
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