I don't know who will listen or care. I suppose it's precisely because this is an internet cesspit full of liars that I can speak casually about this topic without fear that anybody will take it seriously. But for those interested:
The Earth isn't naturally hollow, as planets do not form that way. It was hollowed out to nearly double the habitable space using technology thousands of years in advance of ours.
The "sun" inside is not a star, as a star that close to an inhabited planetary surface would kill everything on it with radiation and heat. It is artificial, and Vril powered. Fusion probably would have sufficed, but the Vril-Ya are well beyond fusion technology.
The Vril-Ya are hominids of neandertal descent which colonized subterranean caves, developing alternate energy sources as combustion emits fumes that will kill you underground.
Vril is the culmination of their research into cool, quiet, emissions free energy. It is a stable liquid suspension of antimatter in which every molecule is a buckyball enclosure, containing a modest number of antimatter particles.
This enables antimatter to be stored as safely as gasoline. Containment failure of a single Vril molecule won't cause a substantial explosion, just a barely visible flash of light and soft crackling sound. This is the source of the sparkling, crackling effect observed by the few who have ever witnessed Vril being used.
Vril technology works by severing the bonds of these electromagnetic molecular cages, releasing the antimatter within at a carefully controlled rate, as slowly or quickly as desired.
This makes some truly incredible feats possible. Imagine the power to boil an entire lake to vapor within seconds. Or to melt a mountain. This is the sort of unfathomably energy dense "fuel" (though it is really a storage medium) needed to excavate the interior of a planet.
There now exist (human) plans to hollow out asteroids, converting the interior just as the Vril-Ya did with the Earth.
