26 September 1670
    Unknown, Artist
    Object type
    Archive reference number
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    height (page): 365mm
    width (page): 233mm
    Content object
       > Solar system
          > planet
             > Saturn
    Copy of a drawing of Saturn observed by Robert Hooke and dated 16/26 September 1670, added at the end of an entry about Hooke's later observation of a lunar eclipse (September 1671). The drawing was shown at the meeting of the Royal Society on 27 October 1670, and judged to agree with Christian Huygens's observation of Saturn in the same month. Hooke's figure was printed in Philosophical Transactions of the Royal Society, vol. 5, no. 65 (November 1670).

    This is copied from RBO/4/109.
    Text with image: Sat Obs. Lond. a R. Hook Septemb. 26/16 1670
    Transcribed by the Making Visible project
    Object history
    At the first meeting after the summer recess on 27 October 1670, Henry Oldenburg read a letter ‘from Monsr. Huygens dated at the Hague, 31 Oct. 1670, N.S. containing his observation of Saturn agreeing with those of Mr. Hevelius and Mr. Hooke, the latter of whom produced his also made in September preceding’ (Birch 2:449).

    Tab. 1, Fig. III: Hooke's observation of the ring of Saturn, September 26/16 1670, in 'Some communications, confirming the present appearance of the ring about Saturn, by M. Huygens and Mr. Hooke', Phil. Trans. vol. 5, no. 65 (November 1670), p. 2093.
    Related fellows
    Robert Hooke (1635 - 1703, British) , Natural philosopher
    Renatus Franciscus Slusius (1622 - 1685, Belgian) , Mathematician
    Henry Oldenburg (1612 - 1677, German) , Scientific correspondent
    Christiaan Huygens (1629 - 2006, Dutch) , Natural philosopher
    ©The Royal Society
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