The compositions of the Earth and Moon are identical as predicted by TGD!

TGD based view of the formation of planets is as mini Big Bangs, that is explosions throwing out a layer of Sun suffering gravitational condensation to a planet. This proposal generalizes: also the Moon could have been formed in an explosion throwing out a surface layer of the Earth with the mass of the Moon. Same could apply also to Martian moons (see this).

The basic prediction of the model is that the compositions of the Earth and Moon are the same. The model of formation based on the collision of a Mars sized object with the Earth does not predict this. Quite recently, Taylor Reed Ramsey informed me that this seems to be the case. The article titled "Composition, structure, and origin of the Moon" by Sossia et al (see this) and this) provides the details.

See the chapter A HREF="https://tgdtheory.fi/pdfpool/magnbubble1.pdf">Magnetic Bubbles in TGD Universe: Part I) or the article What makes the mini Big Bangs energetically possible?.