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Imagine a helicopter that took off from point A on the ground and goes vertically in the air to a certain fixed point B in the atmospheric area at a certain fixed altitude with enough fuel to stay there (at point B) during let's say the whole week. Point B is fixed according to an external system - Copernic for instance. By the end of the week and after several earth rotations, does the helicopter remains at point B? I mean does the point B remains vertically and exactly above point A?