Was my example of using 2k mile dia. spheres to build the earth?

Question

helpful to anyone to see how gravity could support the inner as well as the outer surface of the earth as well as any planet?...james the hollow earth man

Answer 1

Suppose you have a massive body in the shape of a spherical shell, a hollow planet.

There's no gravity inside the shell.  There's nothing to keep the inside surface of the shell in place, aside from the material strength of the rock that makes up the shell.

At the same time, the rock in the shell is in compression.  So the inside surface will be unstable to buckling and falling into the interior hollow.  This process will continue until the planet is solid.

You might enjoy the latest Ian M. Banks sci-fi novel "Matter" about a hollow planet.

Answer 2

The density of the material making up the inner portions of the earth can be determined because seismic waves interact with the changes of medium according to Snell's Law.  This has been empirically measured.

http://www.okgeosurvey1.gov/si.20010126....

The earth is not hollow.  Ignoring clear cut experimental evidence like this in order to support a hypothetical idea is a sure way to make yourself look like a fool.  Science is not about finding data that support your conclusion, it's about finding a conclusion that is supported by your data.