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Jun 11, 2014 at 10:27 comment added Marc van Leeuwen Also the center of gravity of the Earth-Moon system is actually inside the Earth's surface.
Jun 9, 2014 at 15:18 comment added dmckee --- ex-moderator kitten Tides can be coherently explained in terms of orbital dynamics (this is the method preferred by most SF writers), but it has to be done carefully and not in terms of centripetal forces or centrifugal pseudo-forces.
Jun 9, 2014 at 15:14 comment added Marc van Leeuwen No, this is incorrect. Tidal forces are due to the differential of the gravitational field one object exerts on the other. Two equal mass objects orbiting around each other would exert qualitatively the same kind of tidal force fields (double bulge) upon each other as does the Moon on the Earth, even though in that case they would both be circling a centre-of-mass in the middle, with all "centrifugal forces" directed away from this point.
Jun 9, 2014 at 15:13 review First posts
Jun 9, 2014 at 15:14
Jun 9, 2014 at 14:54 history answered Roger CC BY-SA 3.0