History of the planetary systems from Thales to Kepler (1906)
Dreyer, J. L. E. (John Louis Emil), 1852-1926 · Cambridge University Press · leaf 271
the thirteenth orfourteenth century. We find in these text-books an elaboratesystem of spheres designed to account for every particular ofplanetary motion, in perfect agreement with each other as tothe general arrangement of the spheres, and offering nothingnew as to lunar or planetary theory. The… … 1 The sun. 2 Excentric sphere. 3 The surrounding sphere. 4 The complement of the surrounding sphere. 5 Centre of the world. (! Centre of the excentric sphere. other surfaces, in the common centre of which the earth issituated, and which between them enclose a space (or inter-sphere, as Abu 1 Faraj…
Astronomy -- History · Solar system
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