Our moon being formed.

[u/howimetyourcakeshop]

[u/ChemicalRain5513]

that a lot of the material analyzed is made of the same stuff from the earth.

They were formed in the same solar system, I bet Mercury is made of a lot of the same stuff as Earth too, no? Not to disagree with the hypothesis, but I am guessing there must be more evidence?

[u/NaturalTechnician737 → u/ChemicalRain5513]

It's not just that it's the same stuff, but it's the same stuff in the same (or very close) proportions as here. There's also the other planet's core, which is presently observed as an overdense blob in the mantle (so we can see it with seismography).

[u/psychopyro3 → u/[deleted]]