JeremiahBritt says... This guy has some crazy leaps of logic there. The crust is moving over a liquid mantel--> "inner sun" Who the hell has these theories. I don't understand how a ball of glowing metal would be suspended in the middle of the earth if the gravity is centered within the crust. Wouldn't the slightest wobble tip it plummeting towards one of the interior walls? It's not like regular orbit, with satellites constantly falling and missing the earth; inside there'd be no way for it to miss.