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If Europa was the only large moon orbiting Jupiter then it wouldn't have tides, or, more accurately, it would have a permanent tidal bulge and no moving tides, so it depends on what you call a tide. A permanent tide is still a tide IMHO. There's still a tidal force creating a bulge. It also doesn't have to have a liquid surface. Land tides or crustal ...


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Lunar synchronous rotation is quite evident and a trivial logical step for any human being having a model of the Earth-Moon system that involves the Moon being a spherical object revolving around the Earth. This means that the first people to have a concept of the Moon as a spherical object almost certainly were the first ones to realize that for the Moon to ...


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