Letter, from Jean Dominique Cassini to Henry Oldenburg, dated at Paris
Reference number: EL/C1/77
Date: 16 December 1676
Description
Cassini states that the spot on the sun has returned for a third time, that he has been observing Mars to determine its parallax, and raises objections against Roemer's theory for the motion of light
- Reference number
- EL/C1/77
- Earliest possible date
- 16 December 1676
- Page extent
- 1 page
- Format
- Manuscript
- Also available on Early Modern Letters Online
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Citation
Jean Dominique Cassini, Jean Dominique Cassini, Letter, from Jean Dominique Cassini to Henry Oldenburg, dated at Paris, 16 December 1676, EL/C1/77, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/el_c1_77/letter-from-jean-dominique-cassini-to-henry-oldenburg-dated-at-paris, accessed on 17 January 2026
Link to this record
https://makingscience.royalsociety.org/items/el_c1_77/letter-from-jean-dominique-cassini-to-henry-oldenburg-dated-at-paris
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Hierarchy
This item is part of:
-
'Early letters': letters from correspondents in natural philosophy sent to the Royal Society and its Fellows
1613-1740 Reference number: EL -
Related Fellows
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Henry Oldenburg
Recipient -
Jean Dominique Cassini
Author
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Early Letters
The archival collection known as 'Early Letters' is composed of original manuscript letters sent to, or collected by, the Royal Society from English and foreign correspondents.
Dates: 1613 - 1740
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