 There was clearly no doubt in Newton’s mind about the Euclidean nature of physical space, and indeed there seems to have been no doubts among astronomers in the 17th or 18th century that space was describable in the terms used in Euclid’s Elements. It is also likely that the growing recognition of the merits of Newton’s physics cemented a belief that space was three-dimensional, homogeneous, isotropic, and to be described as if it was an infinite coordinate grid, thus exemplifying the theorems—if not precisely the definitions—of the Elements.