Outputs (2)

Trepidation or Precession: The Turning Point in a Tradition (2023)
Book Chapter
Tanner, B., McLeish, T., & Nothaft, P. (2023). Trepidation or Precession: The Turning Point in a Tradition. In G. E. Gasper, T. C. McLeish, S. Olsen Sønnesyn, & H. E. Smithson (Eds.), Mapping the Universe: Robert Grosseteste’s De sphera - On the Sphere (279-304). Oxford: Oxford University Press

This chapter provides historical and scientific commentary on the reference in On the Sphere to the very slow movement of the equinoxes as identified by the change in stellar positions measured in different centuries. It discusses the two different m... Read More about Trepidation or Precession: The Turning Point in a Tradition.

Commentary on the model of the world machine (2023)
Book Chapter
Tanner, B., McLeish, T., Sonnesyn, S., & Falk, S. (2023). Commentary on the model of the world machine. In G. E. M. Gasper, T. C. B. McLeish, S. Olsen Sønnesyn, & H. E. Smithson (Eds.), 'Mapping the Universe: Robert Grosseteste’s De sphera - On the Sphere (132-166). Oxford: Oxford University Press

The chapter provides both a commentary and a science-based explanation of the text of On the Sphere. It contains many diagrams, designed to clarify the geometrical constructions on which the narrative is based. Presented in alignment with the paragra... Read More about Commentary on the model of the world machine.