Surprised nobody's pointed these out in such a long time, or even said anything here at all, but here goes....
Tiny things:
1. The heading "Clarke's Orbit" seems to have a stray "1" or "I" or something in it.
2. The word for Buckminster Fuller type designs is "geodesic", not "geodetic".
3. Carbon nanotubes will continue to be nanotubes even when we can extrude them into kilometre lengths. They are so-called because the *diameter* of the tube is in the nanometre range, not the length.
Other than that, is there any chance of getting a link in here to the entry on Centrifugal Force, which explains why satellites are *not* in fact held up by it since it doesn't exist?
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