Prediction of sunspots
Date
November 1676
Creator
Unknown, Artist
Object type
Archive reference number
Manuscript page number
p8
Material
Technique
Dimensions
height (page): 357mm
width (page): 228mm
width (page): 228mm
Subject
Content object
Description
A print of Cassini's prediction of the appearance of the sunspots in November 1676, which he exhibited to the Royal Academy of Sciences in Paris. It was included in a small separate tract, 'Description du mouvement que doit faire dans le Soleil une Tache sur la fin de Novembre 1676', sent with Cassini's letter to Henry Oldenburg dated 25 November 1676.
This is a variant of EL/C1/65/003 with the observed positions (marked with a cross), which are close to Cassini's predicted positions (see Correspondence of Henry Oldenburg, ed. by Hall and Hall, vol. 13, p. 136n3).
This is a variant of EL/C1/65/003 with the observed positions (marked with a cross), which are close to Cassini's predicted positions (see Correspondence of Henry Oldenburg, ed. by Hall and Hall, vol. 13, p. 136n3).
Transcription
Maculae in Sole appariturae a die 18 ad 30 Novembris 1676 vestigium proximum
Additis locis deinde observatis hoc Signo + notaris, ad Parallelum Solis variabilem, et Eclipticam immobilem reductis
Die 16 Decembris macula querenda ad punctum inter 18, et 19 et diebus Sequentibus ad alia puncta inter numeros
Transcribed by the Making Visible project
Additis locis deinde observatis hoc Signo + notaris, ad Parallelum Solis variabilem, et Eclipticam immobilem reductis
Die 16 Decembris macula querenda ad punctum inter 18, et 19 et diebus Sequentibus ad alia puncta inter numeros
Transcribed by the Making Visible project
Object history
J. D. Cassini, ‘Observation of Sun spot and Saturn’, Phil. Trans. vol. 11, no. 128 (August and September 1676), pp. 689-90 (ref. to Tab II, figs 2 & 3, p. 689; ref. to Tab II, fig. 4, p. 690).
Related fellows
Jean Dominique Cassini (1625 - 1712, Italian) , Astronomer, Astronomer
Henry Oldenburg (1612 - 1677, German) , Scientific correspondent
Henry Oldenburg (1612 - 1677, German) , Scientific correspondent
Associated place