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Treasures of the RAS: The Sphere by John of Holywood

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Published on Feb 12, 2014

The Sphere by John of Holywood

Astronomy was widely taught in medieval universities. This textbook from 1485, in the early days of printing, shows that these students developed a sophisticated level of understanding -- they certainly didn't think that the Earth was flat!

The Latin title of the book is Tractatus De Sphaera, which translates as Discussion Of The Sphere. It is also known as De Sphaera Mundi - The Sphere of the World. The author is John of Holywood, also known as Johannes de Sacrobosco.

The Library and Archives of the Royal Astronomical Society contain books, images and documents significant in the development of scientific thought in astronomy, geophysics and related disciplines. In this series of videos RAS Librarian Jenny Higham displays some of the gems of the collection.

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