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    Heavenly Mathematics - The Forgotten Art of Spherical Trigonometry
    From: Ed Popko
    Date: 2020 Oct 24, 08:35 -0700

    Perhaps already reviewed on NavList, I accidently stumbled onto this reference from another direction and ordered the paperback (used but arrived mint).

    Full reference is: ISBN: 978-0-691-17599-7  (192 pages) Princeton University - Popular Mathematics/History of Science series.

    This book by Glen Van Brummelen emphasizes astronomy and astro-navigation extensively.  The contents include:

    • Heavenly Mathematics
    • Exploring the Sphere (interesting history on the evolution of calculating positions in the sky)
    • The Ancient Approach
    • The Medieval Approach
    • The Modern Approach: Right-Angled Triangels
    • The Modern Approach: Oblique Triangles
    • Areas, Angles, and Polyhedra
    • Stereographic Projection
    • Navigating by Starts (includes astronomical triangle, Haversine history, Method of Saint Hilaire, mention of Lunars)

    A lovely primer and reference.

    Popko

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