I wonder how they isolated it to just gravity measurements in that situation. That would be a lot of variables to sort out. It obviously had to be done in a submarine or some sort of diving bell, otherwise pressures from the sea above would be tremendous. I wonder if the atmosphere they were breathing at those depths would factor into the results. It would have to be a nitrox or helium mix of some sort. That would be an interesting study to read.
https://nasaviz.gsfc.nasa.gov/11234
It could just be CGI bullshit, you never know.
My guess would be computer modeling rather than empirical data gathering.
Exactly, you'd figure if the earth is solid and has a solid core, then the greatest concentration of mass would be at the center if it is in fact a sphere.
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