Well, isn't it possible that the phenomenon only occurs when two massive bodies' gravitational forces are acting perpendicularly against one another and there is something in between them? At night the sun's gravitational force would be stacking with the Earth's gravitational force, so you'd expect that small increase in speed, I would think. Maybe the fact that it doesn't occur says something in itself. Just a thought.
If the forces acting on the inside of the object are balanced, and there's no friction or anything acting, then there will be no source of energy for heat to be produced.
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My father did that on Easter Island a few years ago. I wish I had copies of the photos he took.
Well, isn't it possible that the phenomenon only occurs when two massive bodies' gravitational forces are acting perpendicularly against one another and there is something in between them? At night the sun's gravitational force would be stacking with the Earth's gravitational force, so you'd expect that small increase in speed, I would think. Maybe the fact that it doesn't occur says something in itself. Just a thought.
If the forces acting on the inside of the object are balanced, and there's no friction or anything acting, then there will be no source of energy for heat to be produced.
Uh... Night?