Re: CONCULTURE: dual planets

Simon Richard Clarkstone scripsit:

> However, if two bodies are tidally locked (e.g. Pluto and Charon), the
> orbital distance will not change (if their orbits are elliptical, tides
> will tend to make them more circular), and the planets will have the
> same view of each other in the same place in the sky all the time.
Eventually the solar tide will push two unequal-sized tidally locked bodies
out of sync again, and the Moon will come spiralling in.  But this will
never actually happen, because the Sun will probably have become a red
giant before tidal locking is achieved, never mind before it begins to
change.

--
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