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Interesting fact of the day: despite the moon only being 1/4th the diameter of the earth it is a whole 1/80th the mass! But in terms of volume it is 1/50th the volume.

People don't realize how the relationship between diameter and volume is non linear. So it creates these very unexpected differences, especially at large scales.

@freemo That's indeed interesting. A quarter of the Earth's diameter, but the volume is so drastically smaller. Noticed from the numbers that you can also infer conclusions about the Moon's inner structure - a lower average density compared to Earth's. No heavy iron inner core there, like Earth's, which gives us residual heat, magnetic field and more.

@design_RG In fact the moons lack of a heavy corre is part of why we thought it came from earth, and we also know from the mineral distribution that it was molten at one point. But yea no heavy core like earth.

@freemo Quite surprising right? Eyes can lie. Moon's crust is predominantly pumice, which could explain its lower density (when compared to the variable topography of Earth)

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