I assume this is the correct forum for this question... :P This is the idea: we have a hollow object (probably a sphere or cylinder), attached to a tether, rotating around a central body. The dimensions and speed I don't have specifics for and shouldn't matter: the point is, centripetal force is equivalent to Earth gravity, so water is pressed against the 'outer' edge of the object. Now, this shape is large enough for it to support its own microclimate; i.e. water at the bottom evaporates, rises, and falls as rain. When the object is set on this tether, it is heated from the 'outer' edge of the object. So this is my question: Will centripetal force cause water vapour in the object to rise towards the centre of rotation, or outwards (and return to the water)? As usual, many thanks to any answers that can be given!