It is strange that NASA seismic experiments (if true) carried out in the 70’s had very unusual results! In that the moon apparently rang and resonated like a bell..or as if hollow! Also the moons mass does not equate to it’s size, and considering gravitational theory, why is it that manmade satellites get drawn back to earth, and our earth is getting closer to the sun, but the moon is supposedly moving away from our earth...aaah the fun and wonder of ignorance