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2) OTOH if we move beyond mere talk to actually physically
_causing_ the precession, we would need a pretty hefty cause.
Precession involves adding angular momentum to something
that already has angular momentum.
http://www.monmouth.com/~jsd/how/htm/motion.html#fig-angular-p
recession
The thing causing the precession doesn't need to accumulate
it over a half-cycle or so. So if it is going to cause
precession of the earth's spin, it will have to be bigger
than a breadbox.