Comments from feedback form - "So it may be shrinking. Its ma..."
Fragment of a discussion from Comments:Scientists say the moon is slowly shrinking
Thanks. I don't know Einstein's equations for gravity. An effect of increased density, even if too small to measure for normal matter, will be interesting.
Meanwhile, I suspect the complexities of classical dynamics dominate relativity in the Earth-Moon system: I have read that the slow retreat of the Moon is caused by tidal forces.