Darren New <dne### [at] sanrrcom> wrote:
> Jellby wrote:
> > Yes, but we "notice" tides in relation to the solid earth, so the liquid
> > sphere being deformed while the solid one remains rigid is what we call
> > tide, isn't it (in a broad sense)?
>
> Cetainly, speaking informally, the tide cannot "go out" if there's no
> solid beach from it to go out from.
>
> But if you measure the shape of a world made entirely of liquid, you
> still get two bulges. And if you have a world entirely of solids, you're
> still have less apparent gravity at two places instead of one. And if
> you're tidally locked (like the moon is with the earth) but with liquid,
> you get "tides" that don't move.

And here we go back to Larry Niven's work, specifically, Jinx...  where it's
tidally locked, entirely solid, and pretty damn close to the Roche limit,
so you've got the two "tides" poking out of the atmosphere...

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