Of course, the materials used in the construction of something ten million kilometres in circumference spinning once every 24 hours are far beyond anything we can realistically imagine now, and it is quite possible that the physical constraints imposed by the strength of atomic bonds ensure that such structures will prove impossible to construct, but if it is possible to build on a such a scale and subject such structures to forces of these magnitudes, then I'd submit that there is an elegance in using the same rotation to produce both an acceptable day-night cycle and an apparent gravity which makes the idea intrinsically attractive.
- A Few Notes On The Culture