Credit: ©The Royal Society
    Image number: RS.16652

    Spherical triangle

    Date
    late December 1678
    Creator
    John Flamsteed (1646 - 1719, British) , Astronomer
    Object type
    Archive reference number
    Manuscript page number
    f37 p1r
    Material
    Dimensions
    height (page): 303mm
    width (page): 198mm
    Subject
    Description
    Two figures illustrating how to use spherical triangles to calculate astronomical positions from observed values. In a letter from late December 1678, John Flamsteed explains how to determine astronomical positions using spherical triangles to Richard Towneley. Flamsteed notes that it was Sir Jonas Moore who taught him how to resolve right-angled spherical triangles.
    Related fellows
    John Flamsteed (1646 - 1719, British) , Astronomer
    Jonas Moore (1617 - 1679, British) , Mathematician
    Associated place
    <The World>
       > Europe
          > United Kingdom
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